Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b49cdc9a0355876…

MALICIOUS

PDF

134.4 KB Created: 2020-08-01 20:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d08ecfcaf70f9c17717b3673285df3fc SHA-1: 4b7163e3433d5e1d40096877e8c5f3b1e4824fb1 SHA-256: 4b49cdc9a035587688033a9f9b26e4f357aa8bf53c92ea5b2244789cf9739e66
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. It also exhibits a link farm pattern, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly indicates maliciousness. The embedded URL 'https://ttraff.cc/pify?keyword=bolly+songs+2016' is the primary IOC, likely leading to a phishing or malware download page.

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=bolly+songs+2016
    • http://files.mindnmatter.net/uploads/1/3/1/4/131406369/2293878.pdf
    • http://files.mrssimslit.com/uploads/1/3/2/3/132303337/7268313.pdf
    • http://files.adventuresuntethered.com/uploads/1/3/2/7/132740633/fda838e6a882.pdf
    • http://files.treatsandtitles.com/uploads/1/3/1/4/131408465/jibuvenifu.pdf
    • http://files.eugeniojedimartinez.com/uploads/1/3/0/7/130776151/dedunomirozite_bodewesem_sinolorekesawab_sogozav.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/jizifesifekazoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/doriwuzurodidako.pdf
    • https://cdn.shopify.com/s/files/1/0430/2772/6489/files/ruxavep.pdf
    • https://cdn.shopify.com/s/files/1/0432/7289/6672/files/2173796754.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/zafasesodaguwejazi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8048/9891/files/70486487925.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/25464338735.pdf
    • https://cdn.shopify.com/s/files/1/0428/5841/4236/files/fakinamo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/35281637405.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/97081860842.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/wonobefix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/rokujorenezami.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cd8e.bin
752b98e2b39f3d195eb04c3a23541e3b27f5ae9226b02fa09a1735a6f52774f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD8E 5180 bytes
font_01_sfnt_off0001df60.bin
fbeb5b59b2962e63b38f0ee558b7553543179fefa26fda7016db788ebc398d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF60 14344 bytes

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