Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b2e9ca4166d952…

MALICIOUS

PDF

52.2 KB Created: 2020-10-19 09:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 0ec8dba25a868c09da015c8c1baf41ee SHA-1: 5af7c52001cc674c66e62c98c2c0194b8e7bc8a3 SHA-256: 95b2e9ca4166d952257fb79599f9a65c111bc5e44618f35ee5d82b6171e38d3b
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=requires+security+settings+update+android In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/dekefomivupe-kovak-talajonipa-fedebiraroz.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/dodorodeka-zefezetid-xurutolozilag-marudamijakisip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5f8ca957e4730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f8ceffea61eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5f8a6a876c6ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000767c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000767c.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000b2a0.bin)
    • https://cdn.shopify.com/s/files/1/0429/3384/6172/files/another_word_for_smoothie_drink.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/roady_xt_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3533/6090/files/livabofatozusemibawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7961/2578/files/27339837192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7084/3797/files/16244599426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0601/7692/files/70169891616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/nuzeduvofifukitasax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/boxing_star_hack_detected.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9789/2030/files/pwn_the_sat_math_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/suzuki_ds80_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/sefirovimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6134/4406/files/duvapexomet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/17735939759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0241/2446/files/98857877321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5023/8101/files/revatejinagobok.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000767c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000767c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767C 5328 bytes
SHA-256: cee431dcc8daa4c5d4626ad1ed51f785eb2855a155f13ab1c901f605fa3780e8
font_01_sfnt_off000088aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AA 13208 bytes
SHA-256: 0fc12f45b18fd92904eda13934ec13115bc5a58994a146114764cdb87e010af7
font_02_sfnt_off0000b2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c