Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2c724348d723d2…

MALICIOUS

PDF

46.5 KB Created: 2020-07-13 23:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 24663eaddd1fcb74f1627f0df5c22be8 SHA-1: faac952102ba26655ad999ce0d3d119932bac2c3 SHA-256: 6e2c724348d723d2cf80e6cf31a52dea4d2ed918bb823143faa3f793aa8e22ff
194 Risk Score

Malware Insights

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

This PDF document employs a common SEO poisoning tactic, presenting itself as a 'deep learning' PDF to attract downloads. It contains numerous links to external PDF files, many of which are hosted on WordPress.com, and at least one critical link points to a known malicious redirector infrastructure at 'ttraff.com'. The ML classifier strongly indicated maliciousness, and the presence of redirector links suggests an attempt to funnel users to 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/wb?keyword=charniak%20introduction%20to%20deep%20learning%20pdf In PDF document text
    • http://files.chasingeverydayadventure.com/uploads/1/3/0/7/130738568/4974595.pdfIn PDF document text
    • http://files.frankhagancontracting.com/uploads/1/3/2/6/132681404/zatamutofineve.pdfIn PDF document text
    • http://files.viktoriaivking.com/uploads/1/3/0/8/130814630/8c315637f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lovivofono.files.wordpress.com/2020/07/vugobuxu.pdfIn PDF document text
    • https://julames.files.wordpress.com/2020/07/68626175875.pdfIn PDF document text
    • https://xajilaxaluv.files.wordpress.com/2020/06/xifaruxuliredivise.pdfIn PDF document text
    • https://tupipek.files.wordpress.com/2020/07/fudadifojov.pdfIn PDF document text
    • https://kedewemu291756887.files.wordpress.com/2020/06/tudevejilowekiwijesakirub.pdfIn PDF document text
    • https://zezumova.files.wordpress.com/2020/06/gejebogajinipubafa.pdfIn PDF document text
    • https://biwudago.files.wordpress.com/2020/06/15114066709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2287/6826/files/balipuzapikonalekulig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/23392668276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sikotifukiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/84001506291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/fusan.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_off00007874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 5208 bytes
SHA-256: ed33c76de3392ca9ad1f075ba84adee1bc4ef341eae8c3bb0c17afaec705b8dd
font_01_sfnt_off00008a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 10108 bytes
SHA-256: 30288269c0b916c88ff7cf9b0dfcf5a20ecc57c7d0d30a53148e7804a5afb718

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