Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddb1b1d58f29cd5…

MALICIOUS

PDF

50.6 KB Created: 2020-08-01 21:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2fbe6483168cae18c890721c42f0778 SHA-1: 397a04462f24d0b08da2b9b9f5c0b3ce5dd2ec38 SHA-256: 7ddb1b1d58f29cd58c739192185872b2ce98277abafc2836a498d1e076ba1e6c
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Chamberlain liftmaster professional formula 1 manual' and the malicious URL, suggesting a lure to trick users into clicking through to potentially malicious content. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL is a high-confidence indicator of malicious intent.

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.ru/pify?keyword=chamberlain+liftmaster+professional+formula+1+manual
    • http://files.epitomewellness.net/uploads/1/3/2/7/132712129/5465648.pdf
    • http://files.teamprescott.net/uploads/1/3/1/3/131398406/serorojigik_lajivujon.pdf
    • http://files.meganholdenart.com/uploads/1/3/1/3/131398142/nebile.pdf
    • http://files.power4lifenow.com/uploads/1/3/1/3/131398134/fazowezig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/hp_stream_factory_reset.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/fezulub.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/telotetuta.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/preschool_curriculum_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/menoti.pdf
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/20128604243.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/gusomazimewog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9547/4855/files/57735104914.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/91359543337.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/wow_druid_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/9997/8904/files/31215553772.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/jubabibob.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_off0000791c.bin
59920b7b3a47db2c27ad75f16f3d026ab9ca98f4468bca97c7e68293c868f573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791C 5236 bytes
font_01_sfnt_off00008abd.bin
6c4fde3329f896562fd99884f03cee75a91b4fa9cda05206e9576e5856bcf64f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABD 16044 bytes

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