Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2cfc96a18797b1…

MALICIOUS

PDF

48.5 KB Created: 2020-08-14 00:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdc9c29c52ac29c5421236be22d4ad71 SHA-1: 7aed5bbc5110de192cab92495d9cbff7b4056ded SHA-256: da2cfc96a18797b1d92e323ddefb6cd95546831253a025f79a75a98b47a17d7e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=report+on+calibration+of+burette'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to lure the user to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=report+on+calibration+of+burette
    • http://files.elilanguagemagazines.com/uploads/1/3/2/3/132303077/8871367.pdf
    • http://buzino.letteringchallenges.com/uploads/1/3/1/4/131408056/fawifekipizivuvix.pdf
    • http://wumeri.chipsiunc.org/uploads/1/3/1/3/131383483/zaduxodijege.pdf
    • http://files.prairiedogma.net/uploads/1/3/1/8/131856109/9035ccb23c.pdf
    • http://files.bandoncoosbaybuilder.com/uploads/1/3/1/4/131452981/5261042.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdf
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/wiriranifipepur.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/63198204728.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/nufoxovuxoxefuxokezabo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/wasavafusefatemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/lowivewonezexibikukex.pdf
    • https://cdn.shopify.com/s/files/1/0436/2744/6435/files/retroarch_fire_tv.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/8309094613.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7430/files/morfologi_bivalvia.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/fivexatebovodez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/numerologia_tantrica_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/69305792073.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_off0000723c.bin
1302b5f531d2c92afd960316617ddd629a86254580e513ca342e60b7649a55c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 4860 bytes
font_01_sfnt_off000082d3.bin
1a394cdea24463b422318ec0c984bd3c7b2c2e370948929e5ceff7a9410422f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D3 10496 bytes
font_02_sfnt_off0000a6b5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B5 4324 bytes