Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1ba4f219aa2bd1…

MALICIOUS

PDF

59.2 KB Created: 2020-08-23 17:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7a06f71e319042973825432330e41a68 SHA-1: a6f02ebba9957bf9dc8024ad974dca5dd5d720c4 SHA-256: 1b1ba4f219aa2bd1cbe6308783f3187c3e9894eafbcb7d13f214ea8400856b72
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.ru/pify?keyword=aditya+birla+mf+sip+stop+form In PDF document text
    • http://gepeked.misoagogo.com/uploads/1/3/0/9/130969423/bf199c35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/tabewisesepawumefazodemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1503/7343/files/skaven_clanrat_painting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0925/2250/files/greek_mythology_gods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/pallidio_karl_jenkins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5551/6570/files/pogomiwerow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/96863870505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/fe_electrical_and_computer_review_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/bbl_fixture.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 PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9677 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off0000a071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA071 5420 bytes
SHA-256: 387afb0ae236912a3da970f346b1d22e87f4337917fac19b43052cbe0bee0c5a
font_02_sfnt_off0000b2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C5 13676 bytes
SHA-256: 4c473e0147ff7410e15c8201748f42597396457f246fd4203783333aceb07b82