Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7cf2d2d8d2f5fe…

MALICIOUS

PDF

62.2 KB Created: 2020-07-31 12:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 970ae0f9e57754859b9a953eec61226c SHA-1: 67748d766e057f29a43b88755e721686d90e3b0a SHA-256: 7c7cf2d2d8d2f5fe4add59e5e01f1ec5feb5c904470a0e97fe21fd6671f9af56
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed for SEO spam and traffic generation. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. Although no scripts were extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

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=amharic+phonetic+keyboard+layout+pdf
    • http://files.sb9ers.org/uploads/1/3/1/1/131163738/daluto.pdf
    • http://files.suigenerisjewelrydesign.com/uploads/1/3/1/4/131483955/d6a9cb9cbba3a8a.pdf
    • http://files.futfemuniversal.com/uploads/1/3/2/8/132814272/faduxubikitorazurof.pdf
    • http://files.gammaetaomegaaka.org/uploads/1/3/1/6/131636990/5608641.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/fenupelade.pdf
    • https://cdn.shopify.com/s/files/1/0433/2834/0123/files/gifiwisuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/5966164357.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1703/files/47005452325.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/larabobed.pdf
    • https://cdn.shopify.com/s/files/1/0436/2679/1072/files/19364315756.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/80628033324.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/20632236182.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/delonukuparal.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/gukajazesegi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3486/files/xovozibakobopunadorup.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/56313108618.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0469/files/11008252732.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/ligisilonigigosurofefida.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007842.bin
b2d8e72090ef28beb04d993665abc60254b3bfbfa99ff6150908521ae9db017b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7842 23508 bytes
font_01_sfnt_off0000b423.bin
fe6c666d4c73489f35f78f041b00fae49b15623c2be2910e5c502d4ec9f7bd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB423 5392 bytes
font_02_sfnt_off0000c644.bin
a6b1ebeeb8cec3795dfa21bce6a981e13fe2034fe1ce0967ea859cd234450097		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC644 10316 bytes

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