Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca24b35efe3ffd0…

MALICIOUS

PDF

44.2 KB Created: 2020-07-25 16:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 63df8d0dd589941050d084a49d51af1c SHA-1: 73bc63efcfb91fa238eb2924b1a3304a7e77993b SHA-256: 5ca24b35efe3ffd03d30c5882f3275a8f9d30f833fc044c31bd50ef2dfc802aa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded links that redirect to a known malicious domain, ttraff.ru, disguised as a manual. This indicates a phishing or scam attempt to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/wb?keyword=scantronic%209651en43%20manual In PDF document text
    • http://files.velaband.org/uploads/1/3/1/4/131453021/24b6e572.pdfIn PDF document text
    • http://files.my-bijoux.nl/uploads/1/3/1/3/131381519/jetedogav.pdfIn PDF document text
    • http://files.lizcaplen.com/uploads/1/3/1/6/131606434/7868294.pdfIn PDF document text
    • http://files.critical-juncture.net/uploads/1/3/2/6/132680994/bebobezitar-bowuzo-bawugakizefuva.pdfIn PDF document text
    • http://files.americanbellydance.com/uploads/1/3/0/8/130874124/fexedep_puxupekegilos_fipatafovigu_bupufagated.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/1/0432/2784/0675/files/digejiper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/38452197392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6570/3590/files/zodebemugigoravovoratijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79894841610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/57165281744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/wopekujekiraboviworeri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/mesalidex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/vogazexena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/zadedav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/15725020645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9911/1070/files/22589347719.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D37 5492 bytes
SHA-256: abd964fb52118c971056d21d2c1cca24493a79b03d158cfcf48a4885d50f0194
font_01_sfnt_off00007fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBE 10384 bytes
SHA-256: c59cf2320ec2ce358234f3d9c054caa1c894ccfba62d821f484de5310f4ad2ff

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