Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e65b1b70c4af94d…

MALICIOUS

PDF

46.9 KB Created: 2020-08-04 11:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e862fc528ba81f9168806d384b64600 SHA-1: c89458a337f003a47109b02bf19b594e47365191 SHA-256: 1e65b1b70c4af94d9bfcbebf826514c13d0b5349dbd8bdf709a9ae58bbb42b63
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains this URL and references to other PDFs hosted on Shopify, suggesting a link farm or redirection strategy. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=exercices+de+conjugaison+avoir+et+%25C3%25AAtre+au+pr%25C3%25A9sent+pdf
    • http://files.stephenwitkin.com/uploads/1/3/1/6/131606965/komunetinibolam_nidopek.pdf
    • http://files.nhwgacademy.org/uploads/1/3/1/4/131438449/zuzepi.pdf
    • http://files.nortonshoresparks.org/uploads/1/3/1/4/131452733/pizuvenazere_zejorenusiwo_razozowira_bixazoj.pdf
    • http://files.charmchi.co/uploads/1/3/1/3/131380627/cbf28296f.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/91049674377.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/domamusuvusuzexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/briggs_and_stratton_825_series_carburetor.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/1871528407.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/ncert_class_12_biology_practical_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/2806/9017/files/bikini_body_guide_workout_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/76676485391.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/47454233289.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/78904187195.pdf
    • https://cdn.shopify.com/s/files/1/0434/3001/9229/files/xiwibipokefu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/7096446329.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_off00006483.bin
e8d90a7bfdf3ad54c763774dcc3efcc10d6e3c06bda731db276ea7d60e098afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 5628 bytes
font_01_sfnt_off00007738.bin
71f205268048aa6db39e792f3f0e5ab678e72612b7c3a660a989b86c98603341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7738 11932 bytes
font_02_sfnt_off00009d78.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D78 4324 bytes

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