Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68235577e3057b7…

MALICIOUS

PDF

40.9 KB Created: 2020-08-12 02:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18def032f901022d702371b1c9b0df46 SHA-1: 07dca7ed978fc12a1b39989fe8ba7af7d8f8aa75 SHA-256: e68235577e3057b7f9f4de52133f6d68b0e802a56886a9177e341a9f66dd0c41
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a cable TV package price list, but the primary link redirects to a malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the lure text and the malicious URL.

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=cable+tv+channel+package+price+list+pdf
    • http://sugibuza.thechickenrentalplace.com/uploads/1/3/1/4/131437044/373dce457036.pdf
    • http://files.courtneyfowlerperformanceacademy.com/uploads/1/3/2/8/132814220/zatazivo-sumefogelamizib-nelasagasom-bonewijotuvekar.pdf
    • http://buxelat.mirjamaigner.com/uploads/1/3/2/8/132814930/bibimudapab.pdf
    • http://files.celebratetogetherevents.com/uploads/1/3/2/6/132695829/46b5f53.pdf
    • http://files.daniwellbeing.com/uploads/1/3/1/0/131070035/169b4f71bc.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/bupijuguw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/15528761141.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6049/files/56006264214.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/pre_algebra_textbook_mcdougal_littell.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/44825044934.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/53710453689.pdf
    • https://cdn.shopify.com/s/files/1/0432/8449/6550/files/4957477401.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/wipukenisigesevosisuwet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tujekozovazufurujujazer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nidosavexurirevinuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/atoms_and_molecules_class_9_download.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_off000060e0.bin
73e920a8febcd7dbfb37bfdb63aec64c605a73a6f4effbd616665c93614160f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 5588 bytes
font_01_sfnt_off000073d2.bin
c8f531715becbacdd1a1daacd141ab0030d3234e5099ba0c1709c35f5974e2e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 10116 bytes

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