Malicious PDF — malware analysis report

Static analysis result for SHA-256 62758c844d8e4bc3…

MALICIOUS

PDF

55.7 KB Created: 2020-08-12 22:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b78fdc5f0b429c179d2c0ba5dab8d994 SHA-1: 260ecda3e9531d6098c65d6b9b69f1fb2c76d801 SHA-256: 62758c844d8e4bc3cc1a11ffb30b7b91b25786ffbe059954806822b724392039
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains but also including a suspicious redirector URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to host or link to malicious content. While no scripts were directly extracted, the structure suggests a link farm designed to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/pify?keyword=beowulf+poem+seamus+heaney+pdf
    • http://vasum.destinationtravelco.com/uploads/1/3/1/4/131406436/118be959.pdf
    • http://files.marissahollingsphotography.com/uploads/1/3/2/6/132681295/4999656.pdf
    • http://nofulames.itiskismet.com/uploads/1/3/1/0/131070420/8238057.pdf
    • http://files.techtrekfriend.com/uploads/1/3/1/1/131163932/vumowajofap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/61454200627.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/titugo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/jinakatakulawezadoda.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/mitojowasuledixama.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4384/files/babositevikad.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/53032925315.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/78654708358.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/bouteflika_une_imposture_algrienne_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6979/files/rafuletetoporajojunixogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/estudio_devocional_de_la_biblia_certeza.pdf
    • https://cdn.shopify.com/s/files/1/0450/3411/1126/files/cfp_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/puvejudif.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/estilo_de_aprendizaje_kinestesico.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d8d.bin
0344c7a8e9d2a4ebc27c51cf859f17f367f27168fafd0e681137dfb192cda3be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D8D 5428 bytes
font_01_sfnt_off0000b003.bin
b4987283bea8e06a879231cba8322966f83eb8068ae31317826dda6747fbe4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB003 9992 bytes

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