Malicious PDF — malware analysis report

Static analysis result for SHA-256 d534feb5be19f584…

MALICIOUS

PDF

38.6 KB Authoring application: pstoedit
MD5: 49ea9722c60678b78f674b93ecab9029 SHA-1: 56b17592f2256d68d163520602757b3ad91048a1 SHA-256: d534feb5be19f584a265db1ff117fa7deb175b0114a2fe2b085a4a73ab235ffc
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs pointing to external PDF files, a technique commonly used for SEO abuse or to create link farms. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the heuristic firing 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to redirect users through a network of sites. The document body's content about 'non symbiotic commensalism' appears to be a lure to disguise the malicious nature of the links.

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://ryanevansrealty.com/uploads/1/3/0/8/130814101/fb9549900ba4d.pdf
    • http://janecallen.com/uploads/1/3/0/3/130379101/632324.pdf
    • http://musclegear-asia.com/uploads/1/3/0/2/130289721/c57e5dd6.pdf
    • http://mindfulheartprograms.com/uploads/1/3/0/7/130739713/9e3abab0b.pdf
    • http://divinediamondherbalvsteams.com/uploads/1/3/0/4/130435611/laxomuva_lofurawexifo_tovisukipopu.pdf
    • http://www.feeneysridingstables.com/uploads/1/3/0/6/130621815/1130081.pdf
    • http://kentuckyvslouisville.com/uploads/1/3/0/6/130604962/zusifisobapiwi.pdf
    • http://tgannuscia.com/uploads/1/3/0/7/130739845/suzegezeli.pdf
    • http://mail.guesthousegrill.com/uploads/1/3/0/4/130489530/8128510.pdf
    • http://nicolanotes.com/uploads/1/3/0/7/130776439/mixovawuzimeviruwu.pdf
    • http://www.geobiologiabarcelona.es/uploads/1/3/0/6/130604615/130604615.html#non+symbiotic+commensalism
    • http://janecallen.com/uploads/1/3/0/3

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004117.bin
170063ad9ffaf1f3a336714f72f6ec9265e762bec76fe2a17a482e5e42ef605c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4117 7916 bytes

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