Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d681de7e5e3f8a1…

MALICIOUS

PDF

45.7 KB Created: 2020-07-29 10:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1453c86304633ad93ca3c4aefc25892e SHA-1: ac49666b53e47e9980446a26f311ed36c11f3609 SHA-256: 6d681de7e5e3f8a10feb1e9d1433d04d6ecd4da6bc83905454b3c8a89bc4865d
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body and embedded links suggest a lure to download software, likely leading to malware. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a malicious intent to direct users to harmful content.

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=autocad+electrical+pdf+download
    • http://files.bartendingbydennisinc.com/uploads/1/3/2/6/132695361/josit.pdf
    • http://files.theklbgroup.com/uploads/1/3/2/6/132682904/96ad67278d.pdf
    • http://files.madisonfirstchurchofgod.com/uploads/1/3/1/8/131856234/sitixewo_dezavisigatuw_komitejotosu_pekudo.pdf
    • http://files.foothillsbiblefellowship.com/uploads/1/3/0/7/130776592/3a061.pdf
    • http://files.sparklycharkaleephronesis.com/uploads/1/3/1/4/131437633/5484042.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/fojizajogarevev.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/69264219441.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/bakeles.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/73219261688.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/55662168414.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/60365988545.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/64636610911.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/jidimufavakoduli.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/rekudawejesuvuxofof.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/samazidezowumurakez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.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_off00007719.bin
cde4400649d11316f13bce0c62f84c73131dc32619122bf872c9cd5679295c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7719 4932 bytes
font_01_sfnt_off000087f8.bin
9ef9fedb9d7e71a5cc7f20bfae0b14c1bdfafecbfa35f5f6d60fccbbd062cfe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F8 9844 bytes

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