Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a18ca31c791d184…

MALICIOUS

PDF

44.8 KB Created: 2020-08-24 04:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 310b210fccc80003ac1a23230e30ea11 SHA-1: 87c906cc6cd61fd4986709e968a48d3e503ecc8c SHA-256: 5a18ca31c791d18471479bfee7a5dd4a818713db173b2d4bb454b51bef09a400
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body and embedded links also indicate a lure for a 'dictionary apk free', which is likely a pretext to get the user to click the malicious link. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO poisoning effort to distribute malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=merriam+webster+unabridged+dictionary+apk+free
    • http://jemilu.lightonthedesert.org/uploads/1/3/2/7/132712116/fovorekumo.pdf
    • http://files.pabloguarda.com/uploads/1/3/2/8/132814166/a622d9ab02e4ac.pdf
    • http://mekofot.tomfoolerytoys.com/uploads/1/3/1/4/131482853/jixusidasim_burodusata.pdf
    • http://gomab.homeloverswallcovering.com/uploads/1/3/0/7/130738732/nakevewozo.pdf
    • http://files.palutabulations.com/uploads/1/3/1/1/131164321/56e586cddb2956.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/moultrie_game_camera_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/tazogazasiloredujowume.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/13696442557.pdf
    • https://cdn.shopify.com/s/files/1/0439/7875/2158/files/93690067858.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/agua_de_beber_bb.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7319/files/70069832072.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6999/files/16692028787.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/babolevapuruwevik.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/83366276517.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/tekomiwosidemeto.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/36585718381.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_off00006640.bin
db952466b3edd6d0cac80ee90ca1341803b33d6dc1ea29fb7929970c8b182215
pdf-font-stream PDF embedded font (sfnt) at offset 0x6640 5844 bytes
font_01_sfnt_off00007a2d.bin
ccfdfb3ba6603884c01c6dc54ba57447fd67ab2452792d90660be6edd86589ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2D 14124 bytes