Malicious PDF — malware analysis report

Static analysis result for SHA-256 180784059069e5dd…

MALICIOUS

PDF

74.2 KB Created: 2020-07-28 11:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5419a72d7d5defac827cdf9968059bbc SHA-1: c52feff58fa97209ec78758adcc6c4f26811ceca SHA-256: 180784059069e5dd797a63c4c52bc8e0a6fa7cbd0e6b30d9a2f2af95113fd21d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link `https://ttraff.cc/pify?keyword=hematochezia+pada+anak+pdf` leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests a large number of external PDF links, many hosted on Shopify, which is a common tactic for SEO poisoning or distributing malicious files. The ML classifier strongly supports the malicious verdict.

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=hematochezia+pada+anak+pdf
    • http://files.paperperchphotography.com/uploads/1/3/1/4/131453982/f7cae8fb7806e60.pdf
    • http://files.maketheeffort.org/uploads/1/3/0/9/130969980/ed419f.pdf
    • http://files.kristajoan.com/uploads/1/3/1/0/131069906/5846706.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/xuxuroxaxure.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/pubajudasulonukezigeja.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/livevusimomunipozera.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/64113626710.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/99028257419.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/jozolekawot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/73298648721.pdf
    • https://cdn.shopify.com/s/files/1/0436/9688/1814/files/tomiwafurexevu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2886/3397/files/razabidato.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/tulonevorinoxilirinenero.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/sivovufogifutilutokilaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/23132489048.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_off0000e3b0.bin
bc081b48b1db753208e6487863fcada10e2b52920e1b49cba9a2c57cd0151933		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 4952 bytes
font_01_sfnt_off0000f46f.bin
d16060ecd6ff3244850f6c0c346fccca1f7295235c20214faa5410de250f97ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 11652 bytes

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