Malicious PDF — malware analysis report

Static analysis result for SHA-256 6528715c02ee851d…

MALICIOUS

PDF

55.2 KB Created: 2020-08-12 07:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b4f005880f8c53fe18b314c4e7e079 SHA-1: bae39a61e131b7d36b180e382e92882700fdfc75 SHA-256: 6528715c02ee851d0294a03954f916759f88836cca8e1dfa75b20e3698bf1d6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the text 'Flames of war rules pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=flames+of+war+rules+pdf
    • http://fijavedo.voiceofgodrevivalsministrie.org/uploads/1/3/1/3/131383478/2294a1c8c18043.pdf
    • http://files.sunglassfilms.com/uploads/1/3/1/1/131164063/25550.pdf
    • http://xukakek.leeshawarren.com/uploads/1/3/1/6/131606407/nakanafepiwuzu_dadotanafakob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/dajosekesigulalari.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/kazoliz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/discord_text_markdown.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/15655319893.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/79026746720.pdf
    • https://cdn.shopify.com/s/files/1/0438/2828/1506/files/mergers_and_acquisitions_icai.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/86821920581.pdf
    • https://cdn.shopify.com/s/files/1/0454/0868/2152/files/85255115965.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/powevaligerodirikep.pdf
    • https://cdn.shopify.com/s/files/1/0437/2991/1957/files/article_370_in_gujarati.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_off00009b9c.bin
7714a31573d0116012f67faac61ced6bfc2125f823be5d2907a5384509624b16
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9C 5232 bytes
font_01_sfnt_off0000ad6b.bin
a84e69eaee404d10fcd386508ff3e3606c0a1f6c4985d23b80789b4c74a7cb36
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6B 10148 bytes