Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f041b95e95168e…

MALICIOUS

PDF

50.9 KB Created: 2020-08-14 14:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a92d6d04bed1b1737fc92fed3aafb5c SHA-1: 80e18f97be1cb6c8b1a16e9a62baf574d850d76b SHA-256: e8f041b95e95168ebe7806d684c018b2cfe017983bae4bb6d18a9ba5c8fb651d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=android+messages+rcs+t+mobile'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though partially corrupted, contains the same redirector URL, reinforcing its malicious intent. The primary goal appears to be redirecting users to malicious sites.

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=android+messages+rcs+t+mobile
    • http://jowolabe.jennajordanart.com/uploads/1/3/0/7/130775388/wikaxazu_sixuw_pumunovegabiz_jiloxadazebag.pdf
    • http://files.mrkatlakers.com/uploads/1/3/1/4/131438448/249cef95c.pdf
    • http://files.leuelscientifictech.com/uploads/1/3/1/4/131483184/xafozelovil-xupowugemiti-mologa.pdf
    • http://files.startingpoint.info/uploads/1/3/0/7/130739883/kazul.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/mccb_schneider_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/pofabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/pdf_split_free_software.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/laxul.pdf
    • https://cdn.shopify.com/s/files/1/0434/4263/4917/files/angels_deserve_to_die.pdf
    • https://cdn.shopify.com/s/files/1/0447/9103/8118/files/9133246133.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/ccna_cyber_ops_study_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/75453899044.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/28471220709.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/42811347961.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/maxtor_one_touch.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000790d.bin
bc8452de4efaa0665d50fb7de31eee78a38139090d1e8307c35080f0a7f113db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790D 5176 bytes
font_01_sfnt_off00008a7f.bin
734c1231d735f0bde118184e0329111b0e068d6f02e289a505a27d94ed51a34d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7F 11744 bytes
font_02_sfnt_off0000b054.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB054 4324 bytes

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