Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cc2031010a75f4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 05:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0e0a9cf1112a4a38288fa13ad4276d8 SHA-1: 89828989d0b9c36719c4dac8387a32501912c62b SHA-256: 86cc2031010a75f4d390de7e6a82a354b6cf1f1f4761bd85732425b9b7be6462
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO poisoning tactic. The primary URL identified, 'https://ttraff.cc/pify?keyword=curriculum+vitae+templates+word+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'curriculum vitae templates' and the malicious URL, indicating a lure to drive traffic to malicious infrastructure.

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=curriculum+vitae+templates+word+free
    • http://files.englishtheatrecompany32.fr/uploads/1/3/1/4/131407692/fafes.pdf
    • http://dumum.familyhistorydetective.net/uploads/1/3/1/4/131453433/woxixup-rowukowobanelol-lutut.pdf
    • http://files.biohealthworksinstitute.com/uploads/1/3/1/3/131383838/f1fc68331.pdf
    • http://files.picturedrocksrealestate.com/uploads/1/3/0/7/130739415/bovami-ditirazavesi-pajeg.pdf
    • http://files.alotusheart.org/uploads/1/3/1/4/131452935/wiwumi_jizet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/freund_mathematical_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/powoxeja.pdf
    • https://cdn.shopify.com/s/files/1/0430/5666/0633/files/65287941674.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/82969860699.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/learning_styles_inventory_elementary.pdf
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/libros_para_aprender_ingles_basico.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/kezolonururezanako.pdf
    • https://cdn.shopify.com/s/files/1/0439/2363/6379/files/dajojemenalowoxekib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2508/7138/files/absentisme_au_travail.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f3.bin
2eed6717b56988fb4f7f29edc61d2bd0c9b99cfff200f66218fe99beaaae96a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F3 5360 bytes
font_01_sfnt_off00007921.bin
6524cd05cecdd6862283b9d4055d0faa538e7b839ff99c2571606de31ed084c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 9988 bytes

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