Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4af4243f31799f…

MALICIOUS

PDF

49.3 KB Created: 2020-08-19 18:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a308af3ee5adbfd08c436cfb85c1fc0 SHA-1: bd64c53d6e04d3a09974c1ed58743dc796c0b034 SHA-256: 7a4af4243f31799f7067000ac4d9739e9511174c4f7c3db16ce8db863b655a44
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a reference to 'spanner types pdf' and a URL that aligns with the malicious redirector. This suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

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.cc/pify?keyword=spanner+types+pdf
    • http://files.debcrooke.com/uploads/1/3/2/3/132303077/nafigesupukife.pdf
    • http://files.meadowhillfarmcv.com/uploads/1/3/0/7/130739366/kozumifaramenoneb.pdf
    • http://files.completetechnologysoftware.com/uploads/1/3/2/3/132303322/6448080.pdf
    • http://gorawo.vintagemagnet.net/uploads/1/3/1/8/131856158/4326842.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/basic_japanese_language_learning.pdf
    • https://cdn.shopify.com/s/files/1/0432/5913/4112/files/tipos_de_generadores_eolicos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/30019065321.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5953/files/26129986819.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/xatafovemuwefipugukutalat.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/48481395560.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1752/files/bidonekimukid.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/51752044946.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/marketing_plan_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/9539/2409/files/art_style_guide_video_game.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007759.bin
952b590930a2afa565ae39ad7352f07ac7316351cbbad3920177e39ee010e7fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7759 4836 bytes
font_01_sfnt_off000087c9.bin
4bffea76032b8393b92687a8e2adcfe889eabb895db159c2612d209c51df32cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C9 10076 bytes
font_02_sfnt_off0000aa44.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA44 4324 bytes