Malicious PDF — malware analysis report

Static analysis result for SHA-256 08afd089a3e80606…

MALICIOUS

PDF

44.5 KB Created: 2020-08-19 18:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f28759392025372a5c3f8d134257f604 SHA-1: 4b73de7514db8ba3019361f05f01c616182cf8be SHA-256: 08afd089a3e80606bc619d153e3081370486f30aff87f947ac3b7a02c6a0a2ae
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a coordinated effort to manipulate search results or distribute content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely related to phishing or malware distribution.

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=badri+telugu+movie+songs
    • http://files.blog.timferriss.com/uploads/1/3/1/4/131454521/e985f483789a.pdf
    • http://files.rkrally.com/uploads/1/3/1/8/131856539/1414960.pdf
    • http://files.centralwindsmewe.com/uploads/1/3/0/7/130775025/29f6c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/9886/0707/files/sotogatazobotem.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/79355476859.pdf
    • https://cdn.shopify.com/s/files/1/0430/9224/6685/files/google_chrome_apk_for_jio_phone.pdf
    • https://cdn.shopify.com/s/files/1/0436/4173/3273/files/memiravopuvaxokezetiwawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/28403748239.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/43935988565.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/repanamidesowidilanobir.pdf
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/setiperogepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/95448464916.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_off00006e27.bin
ed598717bfcefb156e53d95bad0329416d1556861b2dff34187649ff01a4f00a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 5256 bytes
font_01_sfnt_off00007ff3.bin
b4df5ef977a36f5b3a09102307dbf2fce0637085eb7801f0fe1feb853600ada9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 11088 bytes