Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c929c416e2341a9…

MALICIOUS

PDF

47.7 KB Created: 2020-08-15 15:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e84e5cc1f34821887e2b571683c68dd SHA-1: bb02c0951e911551eac55365c7b6a1000643b8a7 SHA-256: 7c929c416e2341a9aad775525cf2cd8335cbad4a0e26cfba43b041829edf69eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains a URL that appears to be part of a link farm, aiming to attract traffic.

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/wb?keyword=merton
    • http://wifowupe.cincinnaticorporateyoga.com/uploads/1/3/1/3/131380126/doxevobure.pdf
    • http://bexeb.annranderaadpottery.com/uploads/1/3/2/7/132740214/xulekefunanufip.pdf
    • http://files.tidalmediasolutions.com/uploads/1/3/0/7/130739633/gukipaxifowa.pdf
    • http://kurixonoz.qatarmma.com/uploads/1/3/1/1/131164392/karedeluluvarurita.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/star_trek_the_original_series_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/manual_of_freediving.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/sevosapijox.pdf
    • https://cdn.shopify.com/s/files/1/0433/4711/6185/files/sonda_vesical_femenina.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/asl_alphabet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/data_structures_and_algorithmic_thinking_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/40439799679.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/45761489408.pdf
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/tamil_to_english_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/duguterowirususevev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/17306285017.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7900/files/28417271242.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_off0000775f.bin
665e94d0ebd6dbb12cc799947c5d57f4e124c38895ad3ca08b41466af87e0eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775F 5236 bytes
font_01_sfnt_off00008941.bin
10b5b846e590504bd82c094399c9b3cd92912f3f87d71466fff46fe0280327fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8941 12472 bytes

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