Malicious PDF — malware analysis report

Static analysis result for SHA-256 5818723a72400df4…

MALICIOUS

PDF

40.4 KB Created: 2020-08-07 15:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 718ff74cbe1705b30daa44fa9e1913a2 SHA-1: 4ed17795ae30aba1b42489dace3b5dd7089e4462 SHA-256: 5818723a72400df40b19d506e50d2eb45617f75a0e619020303a28da27598a78
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a search result for a repair manual. This indicates a phishing or social engineering attack aimed at tricking users into visiting malicious sites. The PDF also contains a large number of external links, suggesting it is part of a link farm designed to manipulate search engine results.

Heuristics 3

  • 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.
  • 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=briggs+and+stratton+repair+manual+pdf+download+free
    • http://files.readwriteinaustin.com/uploads/1/3/0/8/130813301/5405976.pdf
    • http://wekurut.versewrights.com/uploads/1/3/0/8/130874493/mexuj_nemutadelekili.pdf
    • http://files.dillylily.com/uploads/1/3/1/3/131380052/budutebineseber_joxeve.pdf
    • http://files.concordstorefixturegroup.com/uploads/1/3/2/6/132682684/zonudasenazako_zexukepuwuwide.pdf
    • http://sorabi.fou2asia.org/uploads/1/3/2/8/132814930/156875.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/zigibelefiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/20885613271.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/kisojepawaxuguzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3204/2920/files/dasixux.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/11465416909.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/25928165165.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/bogotivavivubabuvewigibi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/kigovapivizon.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5169/files/maladaptive_behaviors.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/pupiwisigojelumofexog.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/2020_cadillac_sts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/worawabakejusokoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/41468064794.pdf
    • https://cdn.shopify.com/s/files/1/0447/8284/6109/files/biochemistry_test_normal_values.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/67474897700.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/
    • https://cdn.shopify.com/s/files/1/0428/059

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f29.bin
72030d4f22c52314c8a6da4fbd19dddbf4a5f62705b9b8ff207b25871fcb43e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F29 5504 bytes
font_01_sfnt_off000071de.bin
4937734bf3310045677429f922127723ef074c0db8aad24a7514aca573ac373e
pdf-font-stream PDF embedded font (sfnt) at offset 0x71DE 10032 bytes