Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf83d332e337680a…

MALICIOUS

PDF

67.6 KB Created: 2020-08-06 06:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e533f4c914fff3e5116b2b11065478 SHA-1: f5319f6a2b008595426925212e939d44713b0ec6 SHA-256: bf83d332e337680a9a68b102e79905add914e2cff3d7aae29f281afe726701ac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=singapore+airlines+company+profile+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to reference 'Singapore airlines company profile pdf', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic.

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=singapore+airlines+company+profile+pdf
    • http://files.stettleragsociety.com/uploads/1/3/1/6/131636808/sufexulofugajozukob.pdf
    • http://files.piratereaders.org/uploads/1/3/2/3/132302963/vivadop-mobexozunaj-votebil-lavalaguga.pdf
    • http://files.woodburyspeclass.com/uploads/1/3/1/6/131607600/bovovagudiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/funilege.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/anaconda_spyder_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/texuwixop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/kokerokekojevarexelumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/gotumasekiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/neuralgia_del_trigemino_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0431/5024/6048/files/ruvugamokijusimediwu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/54501352049.pdf
    • https://cdn.shopify.com/s/files/1/0429/2814/4543/files/simobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/funalixod.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca1e.bin
9497475c55f7f808169aedd5db68134a126e17bf0d26c64e02a1d8c08039f28c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1E 5680 bytes
font_01_sfnt_off0000dd71.bin
e6959cd95bb124d515471542735a1739d23812013a21fabde5da22216f5b4076
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD71 10472 bytes