Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb854581fcca3983…

MALICIOUS

PDF

50.4 KB Created: 2020-08-12 12:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef0186897269dd4e0c97a246cec08ed9 SHA-1: 0d528616dd63f7ffbc390a2db67aa779b2bcb6c3 SHA-256: fb854581fcca398334b87261f3af68975c250edf515b524a3335a8bd0bce9d8d
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text related to 'Behindertenparkplatz schild pdf' and the malicious URL itself, suggesting a lure to a phishing or scam page. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.com/pify?keyword=behindertenparkplatz+schild+pdf
    • http://files.reelbritproductions.com/uploads/1/3/0/7/130740149/dediza-mokeb.pdf
    • http://lesida.tinytailsk-9rescue.com/uploads/1/3/0/7/130775350/560769.pdf
    • http://xuwavu.ktdinnov.fr/uploads/1/3/2/7/132740720/bavepisowa-sokifufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/gm6_guitar_chord.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/92334806995.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/dabokafezirudutemogemagin.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/zaxifuso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/66089999249.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/duvobepakalowavam.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/bosumufemifagedu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6837/2632/files/jewizaris.pdf
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/94076473343.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/99990102420.pdf
    • https://cdn.shopify.com/s/files/1/0449/8640/0936/files/tofigolajaxufujijitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/majarutowilobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/pezut.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_off0000857b.bin
d944d25d2a33d18a133506313a4034b9460edfa59e3f2d4629778b7db5257512
pdf-font-stream PDF embedded font (sfnt) at offset 0x857B 5404 bytes
font_01_sfnt_off000097d3.bin
421641539c0a6734b1249f4dccefc817b192c8b2048d1dd129677e06e1dc1cf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x97D3 11244 bytes