Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60e176d625ae881…

MALICIOUS

PDF

54.7 KB Created: 2020-08-19 03:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a786c532bbb141b5b615cc520c4cde1 SHA-1: 85ad928dc3852a8cdd981aa7f419fa6780f8f46e SHA-256: a60e176d625ae881cc663337e71e8f26da702717d6ff4962e0d6e8c4816747a0
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This indicates a phishing or scam attempt, likely to lead the user to malicious content or malware. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=oxford+phonics+world+2
    • http://files.sherwingaje.com/uploads/1/3/0/7/130738657/e3f1f3d8.pdf
    • http://tulepejug.rossdanieldance.com/uploads/1/3/1/3/131383314/dc45d162a48590.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/45210038968.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/80275923328.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/sovojad.pdf
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/the_instant_economist_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/50780230117.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/82375443144.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/olaudah_equiano_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/96777692457.pdf
    • https://cdn.shopify.com/s/files/1/0453/2230/5691/files/99723399811.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/cebada_propiedades_medicinales.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/doputonodenozajow.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/wamexofewupegowokol.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4127/files/anatomical_terms.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004520.bin
50759c40df67ec181331d37bc16259f4db20c39507a2c7d18444f96545433770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4520 6424 bytes
font_01_sfnt_off00005500.bin
367a64406c607e7311405c9dd97b0ac70100774c91990274dd0cd49e48c30d03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5500 4940 bytes
font_02_sfnt_off000065c5.bin
a7cedea10db1d1c4ed14c6d5fa6838dab2692f1a690e6e7908600c26edb99199		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C5 8228 bytes
font_03_sfnt_off00007c6a.bin
50585b49d0b93e3ea02e38d692b5416a88f190aa2aca059a693f818c4c023cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6A 9768 bytes
font_04_sfnt_off00009e1c.bin
20070cbbd8b3a50ab28fe969b00eae5177a275e95f130c2e9e784813e7e8afb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1C 16760 bytes
font_05_sfnt_off0000b53c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB53C 4324 bytes
font_06_sfnt_off0000c2f0.bin
5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F0 1736 bytes

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