Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4bff507d70f4a1…

MALICIOUS

PDF

50.9 KB Created: 2020-08-31 02:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: abe9c650474b73a6f13dff2ef6f49962 SHA-1: db81a5904814d04e380670b30eaa375265f65447 SHA-256: 3a4bff507d70f4a1aed7a1b5b6d097acf0bcb3f5a3753ec2ccfde5371a38dca5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword related to 'optifine xray'. The document body, though heavily obfuscated, also contains this URL and numerous other Shopify URLs, suggesting a link farm strategy. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=1.14+optifine+xray In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/autoformation_windev_mobile_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/a_clockwork_orange_slang_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/gibbons_creek_resevoir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/vimizefumelolilag.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4f270c_dc9a17fd991e4dbca6bfa8a5d9a45231.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cd2312a66bca4ca287641161d6b601fd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_de65114771cc4a4da31b3019933ad817.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/97368a_523a6230cd554eeea017a0d75b889a30.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fb83f1_f190bfdb526b4f7faf5bcec841c29319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/rukobefosulunikabetazot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9909/files/1799900128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9825/0146/files/78795325143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/nidusezozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/51811492636.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6559 4720 bytes
SHA-256: 17bd0acab4cf98f696665e5f0b22927e809ed287356dda95036491b7ff2f273f
font_01_sfnt_off0000757a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757A 10932 bytes
SHA-256: 91498ff7105b5ab4cc2816e320d9d8024069a47af92e43941137d018aa6595dc
font_02_sfnt_off00009a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6F 16064 bytes
SHA-256: f7fb55aa7df24da556f1e6a14ff3e973b5c7274e6851c040e899454d18355684
font_03_sfnt_off0000af03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF03 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71