Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe50b83404b373f3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-12 15:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 248f374d55fb8bb7bd61c1580dc09b8f SHA-1: 808b429e48f3932522877dbf1f6cc162859c597b SHA-256: fe50b83404b373f3bf7aa12b74d239bc8d51be6143fda4de2e51a69566f29abe
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though partially garbled, includes text related to 'operational amplifiers with linear integrated circuits 4th edition pdf' and the malicious URL, suggesting a lure. Additionally, numerous links to Shopify domains were found, many of which are likely part of a link farm to improve SEO for malicious content.

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/pify?keyword=operational+amplifiers+with+linear+integrated+circuits+4th+edition+pdf In PDF document text
    • http://files.566westadams.com/uploads/1/3/1/8/131857540/764da.pdfIn PDF document text
    • http://files.boxbororegency.com/uploads/1/3/2/6/132681544/473272.pdfIn PDF document text
    • http://files.abprecisionelectric.com/uploads/1/3/1/6/131637385/a01ba7d4.pdfIn PDF document text
    • http://kokekase.theexeterinn.com/uploads/1/3/2/3/132303035/bobalivosetetid_wusifa_xunoloja.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/1/0433/6890/6906/files/caries_detection_dyes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3113/3351/files/dependent_prepositions_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/tibefimewavixesefapitupom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/bissell_proheat_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/tozodudasulodanon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7707/4086/files/najuforosinijarukufij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/50_challenging_algebra_problems_fully_solved.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3187/8049/files/malayalam_devotional_songs_lyrics_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/43748440772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2095/1450/files/49057949041.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 6

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_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 5776 bytes
SHA-256: d74d80fefd290cd57a5122676909af330212b4dac311bcd529786946e2f90c45
font_01_sfnt_off00007510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7510 12944 bytes
SHA-256: 1b435124f6e6fe780aa4c393fbd098bb29c673eb341f22024eb15e4369ec4e46

Open this report in the interactive analyzer, or submit your own file for analysis.