Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb34625f150c11ff…

MALICIOUS

PDF

62.2 KB Created: 2020-08-05 08:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e424715ffb6dd2fa6764a89cf8dd7156 SHA-1: 7c00295bfcffabdc5d2c6fcb842782d8edb2e46e SHA-256: bb34625f150c11ff16d1aa833092544e32f19a7eb2376987d81833e5692fb954
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.cc/pify?keyword=definition+of+blue+ocean+strategy+pdf', suggesting a lure to a malicious site. The presence of a large number of links to Shopify domains, some flagged as benign and others unknown, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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=definition+of+blue+ocean+strategy+pdf
    • http://files.jablacrosse.com/uploads/1/3/1/0/131070407/jijubevurila_setabopo_xuwefiserune.pdf
    • http://wekurut.versewrights.com/uploads/1/3/0/8/130874493/mexuj_nemutadelekili.pdf
    • http://files.irmacalabrese.com/uploads/1/3/1/4/131453698/zesupar_wezukekekir_lunefujemikibag.pdf
    • http://files.mirandayaver.com/uploads/1/3/1/8/131871963/6974542.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/zotunovenixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/ladefixalezibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/wumaxajox.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/bimipazepaxos.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5096/files/cirrosis_hepatica_alcoholica.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/95049384235.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/why_arusha_declaration_failed.pdf
    • https://cdn.shopify.com/s/files/1/0440/6696/3621/files/96901146029.pdf
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/14228824172.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/34270466903.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1688/files/70745228296.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/mmrc_dyspnea_scale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bdd.bin
67152b2d93707f2752018d89b612a0f79e090ea157ec289762756ae765116162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDD 6856 bytes
font_01_sfnt_off0000b309.bin
ae949ba78d32d30f5a1d2645e105ec5bcac225378c0fb43a3f920d2646fd021c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB309 5564 bytes
font_02_sfnt_off0000c60c.bin
33fda337d8acfe2d0cca76eed82a502bcca1b440599703bb83612fa18d5aed00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC60C 11496 bytes

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