Malicious PDF — malware analysis report

Static analysis result for SHA-256 747c95ad1904adb0…

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 02:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc63d0253b549c8e5b02cf65dd80e0b1 SHA-1: be89ca19e7fd8378365e5139448e0d8366371cf4 SHA-256: 747c95ad1904adb04d63a283153ff15ae5626dd0d7364aa90c52293ee20f0c0b
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to a book and a URL that is also flagged as malicious. This suggests a phishing or malware distribution attempt, likely using a spearphishing attachment as the initial access vector.

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=clinical+pharmacology+and+therapeutics+book+pdf
    • http://fazovud.homecaravanservices.co.uk/uploads/1/3/1/0/131069839/tozojanemo.pdf
    • http://zigadokuf.nbsccromercampusscience.com/uploads/1/3/0/7/130775540/5258380.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/42435649850.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/rolefarerupex.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/barbarian_assault_queen_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/84815481870.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3712/files/malambo_no_1_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/puxubol.pdf
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/kilexelixuveruma.pdf
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/vebagurixobixopob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0141/files/53732464.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a4d.bin
27844c98264c1440317a59827653b4af32b6f45bc2c1ed7dcdd4a3cbe79a9841
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4D 5780 bytes
font_01_sfnt_off00006dc4.bin
4591ec11c62a41dff0cf242099ef4cf9f16744820e26f36331d6b3d650617065
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC4 10052 bytes
font_02_sfnt_off00008fdf.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDF 4324 bytes