Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47070d88d4d4f9d…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 05:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a2353c6cf7c2ee5b57a243f3ff04424 SHA-1: ec08f1c949be11e331f0342a61dda7e3d4ca897c SHA-256: d47070d88d4d4f9daccd809d276c7884de1a8883706596c88dc60fec5cc5c343
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=wallpaper++video+song', is identified as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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=wallpaper++video+song
    • http://tanaj.pamelawernermurderpeking.com/uploads/1/3/2/6/132682076/40822482d5f.pdf
    • http://files.thefrontporchgardensandgifts.com/uploads/1/3/2/8/132815872/a5c647.pdf
    • http://natijuve.allterrainridersatvclub.com/uploads/1/3/2/6/132681229/7500da67015.pdf
    • http://files.bmqg.org/uploads/1/3/1/6/131608037/xabalewekafup-kuvimujijepi-gidiren-vebuwosisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/28682727010.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/bikasetoworelukorubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/xilunakikevavivozefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8307/files/alman_dili_yukle.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/xizoxave.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/bemaposefumokimiboremi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/13302380736.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1589/files/pipor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/tigorarudodiwugojobilifo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/12951998257.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/diwudi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea4.bin
a6df575afdd45838f647aba6bd6369c93680b3a925d4146c96bf920d76a708fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 4908 bytes
font_01_sfnt_off00006f61.bin
c254103073ef3de97233f9ff6061a9c920a031e25e43874f180bb8f090354fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F61 10288 bytes
font_02_sfnt_off00009257.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9257 4324 bytes

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