Malicious PDF — malware analysis report

Static analysis result for SHA-256 77935c05cf4ae2e9…

MALICIOUS

PDF

50.1 KB Created: 2020-08-12 18:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 128ab3cf0cc100af9fdc54210c2d2cea SHA-1: 776f55a564a1a96b9ebc7f5ab2d6f19e08e399ae SHA-256: 77935c05cf4ae2e9bd1a11914e804528de72bfed37d0060a251ba2d6af75cd42
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirector infrastructure like 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to lure users with keywords like 'english grammar tenses in urdu pdf'. 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.ru/pify?keyword=english+grammar+tenses+in+urdu+pdf In PDF document text
    • http://womemojam.designwoodlands.com/uploads/1/3/0/7/130740596/4329793.pdfIn PDF document text
    • http://jadoxar.accademiale5sinergie.com/uploads/1/3/0/7/130775169/8642719.pdfIn PDF document text
    • http://files.monalisamugshots.net/uploads/1/3/0/7/130776562/sufenadukiraju-pigitapimaka-gufitopamamer-fubejusezepi.pdfIn PDF document text
    • http://files.arvidsonconsulting.com/uploads/1/3/1/3/131383743/d37d2d49768eab1.pdfIn PDF document text
    • http://files.mybluethumb.com/uploads/1/3/1/4/131438449/nirifivapiwafuf.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/1/0437/3594/1285/files/miwera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/fizasakar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/34670743842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/network_security_tools_o_reilly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/67728225141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/20552718901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/29205348372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/matasojovafepagodid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/28898986602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/wibakisupigobumadunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/gopejexifisoteka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAB 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off000086a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A5 5412 bytes
SHA-256: 24c15ad8af346307a7db6ccdb6f608e6d555a6acfe29faca136c9bebe492a999
font_02_sfnt_off000098dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98DD 10024 bytes
SHA-256: 07185f8feb13bba5bd08de8e1cb1905e095cacd0261859990305c6d9f023e2f0

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