Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74b01125db8f724…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 01:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eb9ceda57cf0f77696a099751a46308 SHA-1: 5cfd73c4da598a6bcf6a6e62e079786a322c142f SHA-256: a74b01125db8f7242c0936d5fab6bacca39c379efb66230423d9370724478b77
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a harmful site.

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+borescope+endoscope
    • http://lugox.thefulfillmenthouse.com/uploads/1/3/1/4/131437987/gurizo-kizafexago-vawinebatazi-lixif.pdf
    • http://files.bradscedarshop.com/uploads/1/3/1/1/131164130/susabiz.pdf
    • http://files.missionalwomen.com/uploads/1/3/0/7/130776246/gijokinakus_watopofima_sozufuduza.pdf
    • http://files.risingachievers.org/uploads/1/3/2/7/132712005/kerupesusizegasenir.pdf
    • http://wiwovag.ceibalogic.com/uploads/1/3/0/8/130873952/saxifuxop_bariwabowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5610/files/crioterapia_dermatologia.pdf
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/xafogore.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/bobcat_751_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/piponolimewidozabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/ganapati_atharvashirsha_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/72467415210.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/calendrio_futebol_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/13663682465.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/4189575873.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/52480634913.pdf
    • https://cdn.shopify.com/s/files/1/0436/1145/5645/files/32080671282.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006675.bin
85ef08840bb348ed00afb54b92d0ab2d81529c435f8f17b8913710b184837527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 4956 bytes
font_01_sfnt_off0000774f.bin
6e2ed49fb0725ff9eb2aabc5ceb127429aace37ced82e5dd49a45a4f1085e816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774F 10692 bytes

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