Malicious PDF — malware analysis report

Static analysis result for SHA-256 082a3f45162456ac…

MALICIOUS

PDF

44.4 KB Created: 2020-08-05 17:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2230ec22678d8c4c5bf57f0e43536acd SHA-1: 05689ae4684e0035c8b6224bd6051305b20e29dd SHA-256: 082a3f45162456ac0f738a396fbdd1d9b305cce24342201126c2ae5b30b3d6ea
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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=navy+blue+jacket+manual+25th+edition+pdf
    • http://files.travis-wayne-goodsell.com/uploads/1/3/1/4/131454316/wosijazafu_wajorom_rided_bedovenenuwij.pdf
    • http://files.woonsocketschools.org/uploads/1/3/0/8/130813827/7668852.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8278/4673/files/fepasilotamoretobogisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/juxutugebamemupoduki.pdf
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/tipos_de_cirrose.pdf
    • https://cdn.shopify.com/s/files/1/0436/2479/2224/files/fupomavolalenubetobumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/gagenujokowutumelizuzefur.pdf
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/10038188738.pdf
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/40681997131.pdf
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/western_union_mtcn.pdf
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/17601779380.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/mirugip.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/3360398101.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_off000069d6.bin
912f531b4abb7f4629f30936f6e9081da186cd9595dab47be371aeec93a0bf6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D6 5788 bytes
font_01_sfnt_off00007d8c.bin
bca659b0dc98cab0c6885d9b8fa90a7e62d4890fd7b9697f7280c6e6abac65f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 11816 bytes