Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2bf861ffce8e26…

MALICIOUS

PDF

81.6 KB Created: 2020-07-30 08:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8257330ab73c06b7f3f8716878695e11 SHA-1: e8e6faa5076c4f210a989f948fbe2a9320908dff SHA-256: 0a2bf861ffce8e26a9e81bba61989055d0f429b2f246927e37f89e7ac83ee57d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'camp craft honor pdf'. The presence of numerous external PDF links indicates a link farm strategy, likely to distribute further malicious content or phish users.

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=camp+craft+honor+pdf
    • http://files.deborahlustig.com/uploads/1/3/2/7/132741334/3053309.pdf
    • http://files.cherokeerosehandcraftedsoaps.com/uploads/1/3/2/6/132695575/666836.pdf
    • http://files.dfwfunbounce.com/uploads/1/3/1/3/131398479/1bcf7c48f6b62.pdf
    • http://files.milinclinic.com/uploads/1/3/1/8/131857916/fapafisubemevuxis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/vonobimezuvug.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/wikawurevopixalokepipaje.pdf
    • https://cdn.shopify.com/s/files/1/0437/7955/5486/files/59231304172.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/mabixeluxozusofiba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/11018562016.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/kixifar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/39372490281.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/xifufivetolofuribesuxamub.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/1696144457.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_off000104f8.bin
112b6d829f9fe81b2460cc0d7ef82fd1a399892f46a0c8e0ca363df9959397c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 4832 bytes
font_01_sfnt_off00011532.bin
b08d4c64a4ef475faca932a3e04212149c4eeffb6f53195ce90c131856596590
pdf-font-stream PDF embedded font (sfnt) at offset 0x11532 10436 bytes