Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9bb18c14bd989f…

MALICIOUS

PDF

55.7 KB Created: 2020-08-04 20:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 914e4eb1ed7e1403ab3763ee0906b566 SHA-1: 01f9ff5b2c399529361412e56d07799ae7f5c59d SHA-256: 0f9bb18c14bd989f4f57f95b16703eeab1f7e63670b670116f941404207a101b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though partially corrupted, includes a URL that appears to be a lure for a business plan, likely intended to trick users into clicking through to malicious sites. 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=coffee+shop+business+plan+philippines+pdf
    • http://files.georgiestaight.com/uploads/1/3/1/8/131856706/49a3b1869.pdf
    • http://files.myrandastangeland.com/uploads/1/3/1/8/131856293/608d6e3fbd.pdf
    • http://files.lockportliteracy.com/uploads/1/3/1/6/131606402/036024c5.pdf
    • http://files.127energy.com/uploads/1/3/1/0/131070866/gugagebunimixivelara.pdf
    • http://files.majestichouseofprayer.org/uploads/1/3/1/4/131406348/5587199.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/88770523110.pdf
    • https://cdn.shopify.com/s/files/1/0448/5254/3649/files/detroit_diesel_671_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/attitude_scale_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0437/2702/8375/files/36493847.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/check_basin_irrigation_method.pdf
    • https://cdn.shopify.com/s/files/1/0428/3010/2694/files/xelilidedovuzikorovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/tisunekozane.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/47638457277.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/pusawexijeruwodesenax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/62187837714.pdf
    • https://cdn.shopify.com/s/files/1/0431/9916/8673/files/48020886334.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_off00009da8.bin
9fe38acdcf725c943bbfdcb3ab962cccfc15773c0b2b13ce142fcb9311710856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA8 5076 bytes
font_01_sfnt_off0000aee0.bin
7f893ac42c68a4d2f3065ca7f2e98bad047d051c313df5bf7b8feee16abca810		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE0 10208 bytes

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