Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8aa680f7c093e2…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 03:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9108a90b4dd7e7aaad8a998cecddb3fe SHA-1: 6b1091a94a245743e5c6a34531e4158e21d2258d SHA-256: 5b8aa680f7c093e2e082e8d067fe94b9bda66b1614357772a5fb5996dbf5104e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to malicious sites. The document body, though heavily obfuscated, contains the text 'Dbd pig guide' and the malicious URL, suggesting a lure for a phishing or scam campaign. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=dbd+pig+guide
    • http://padezewi.wabseny.com/uploads/1/3/0/9/130969940/garobafewajusedubi.pdf
    • http://files.justonlyjenn.com/uploads/1/3/1/4/131406075/pamexelo-ziriliwurevej-guzovumute.pdf
    • http://files.chewoncakes.com/uploads/1/3/2/6/132695543/zavulirofezal_gilawufijuzunet_dutadi_xefizetinata.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/76872498889.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/apc_1kva_ups_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/70374380055.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/stnose_carotidienne.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/97728429652.pdf
    • https://cdn.shopify.com/s/files/1/0430/9352/4634/files/download_materi_osn_biologi_sma.pdf
    • https://cdn.shopify.com/s/files/1/0429/0428/9439/files/xurulewodora.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/alan_gratz_refugee.pdf
    • https://cdn.shopify.com/s/files/1/0432/0739/3439/files/82387057936.pdf
    • https://cdn.shopify.com/s/files/1/0436/9511/2347/files/telegiromilokarogolajitu.pdf
    • https://cdn.shopify.com/s/files/1/0466/2758/6213/files/revista_atualidades_2018_2_semestre.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000728c.bin
fed34076cee65727f04fd50c82f8149471900a36386e0c120dbdf741c4fcf4a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x728C 4752 bytes
font_01_sfnt_off000082c8.bin
db49ed1a2db796b47abcee124ee7485587212ca73a714e56bcd8e37d56f962d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C8 10244 bytes