Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac418bc416e25ba…

MALICIOUS

PDF

51.4 KB Created: 2020-08-28 08:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c485ed4facc77fa66f5018ffdddb85d9 SHA-1: 755a858489f658275a2545db2043698a9d319602 SHA-256: 6ac418bc416e25ba36e862f2436b087d8ddc16e2b6c1f2f98d991a2ca8c02d8a
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as an offer for game tokens, which redirects to a known malicious infrastructure. The document also hosts a large number of links to other PDFs, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=ottenere+gettoni+top+eleven
    • http://files.bungustore.com/uploads/1/3/1/3/131379443/nobel.pdf
    • http://taxes.n3vem.com/uploads/1/3/0/8/130813059/tovezolegi.pdf
    • http://files.professorwillis.com/uploads/1/3/0/9/130969819/3536095.pdf
    • http://devujo.honeyspringsfarm.net/uploads/1/3/1/8/131872096/9540156.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/jixirenimekeluvudavoti.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/zusexefibiwit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4488/7966/files/8601533020.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/bheema_movie_mp4_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/90090253732.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2651/files/80279241531.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/emerald_tablets_of_thoth_doreal.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/sudemoxomufanitisararevoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/72810179474.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/advanced_conduction_heat_transfer.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/87769351191.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635d.bin
95b8098a4042feaabcbc2eb97379a5d053fb975780bc29df41deb7d226d425c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635D 3136 bytes
font_01_sfnt_off00006e89.bin
b313fb203d87289454fdd6c0447fe5f24e4b6b6dcb73376b24189b3d816e8fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E89 4684 bytes
font_02_sfnt_off00007e97.bin
9163d0e436d03680676ea3afa20eb959de22484cb67319214e202d9d1bffb519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 14948 bytes
font_03_sfnt_off0000ab85.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB85 16036 bytes

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