Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0a27ea1d37c18a…

MALICIOUS

PDF

44.0 KB Created: 2020-08-19 11:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec4c59e5bf83735f1db51f7d7b23871f SHA-1: d40f14f65ef090c8fbdc709cf02609a492d52dfc SHA-256: ad0a27ea1d37c18ad1c8e8648af33837419f6aabcc95c7019687fabd1a130546
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'business website templates free for asp. net' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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.ru/pify?keyword=business+website+templates+free++for+asp.+net
    • http://putegomat.michelle-peterson.com/uploads/1/3/2/6/132682607/filaxobaj.pdf
    • http://files.oceanviewsu380.com/uploads/1/3/0/7/130775712/c4075dea8604.pdf
    • http://files.capecoralkayak.com/uploads/1/3/1/3/131378950/5e63e0.pdf
    • http://dapukon.macroleaders.com.au/uploads/1/3/2/8/132814930/3987192a4cb13b8.pdf
    • https://cdn.shopify.com/s/files/1/0434/0311/6709/files/nigubomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/japanese_bad_words.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/82728973873.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/95765179988.pdf
    • https://cdn.shopify.com/s/files/1/0446/9365/1610/files/anjaan_movie_songs_5starmusiq.pdf
    • https://cdn.shopify.com/s/files/1/0432/8908/4068/files/ximizixul.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/nolewebafifulilekeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8800/files/6049532467.pdf
    • https://cdn.shopify.com/s/files/1/0431/0781/1495/files/eromski_ludzie_bezdomni.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/63993590112.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/29091965319.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_off000060aa.bin
563cc3eb6fe51c555294994d504e8ba78e96de3e20fea3e1c6bb31035e11b5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AA 5240 bytes
font_01_sfnt_off0000726a.bin
de28e3cd8fa6d4aa2959a9c74e1a4ed28e311ae64f58f44bb80a2deeccfc612f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726A 10032 bytes
font_02_sfnt_off000094e1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E1 4324 bytes

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