Malicious PDF — malware analysis report

Static analysis result for SHA-256 095664cb1c354832…

MALICIOUS

PDF

47.0 KB Created: 2020-08-01 10:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcbc640bd5ef96bfa193b232a07506ee SHA-1: 58cfa23858259bcab5b78c7816f86460ec48715b SHA-256: 095664cb1c35483226805309aaa287a39c21884591ed7aa45d5967d7100a1b14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to a link farm designed to redirect users. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=extreme+landings+pro+apk'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document body and heuristics suggest a lure to external malicious content.

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=extreme+landings+pro+apk
    • http://files.countyparkfriends.org/uploads/1/3/0/8/130814279/zobisulit_selitiga_sojinotavom.pdf
    • http://files.musicbyspecialarrangement.com/uploads/1/3/0/7/130775396/tonalegov-womogaliso-luzerufove-vizuf.pdf
    • http://files.cindymonten.com/uploads/1/3/1/4/131409693/reruzipugomi-vasemodaki.pdf
    • http://files.cigarmechanicllc.com/uploads/1/3/2/6/132695336/3474990.pdf
    • http://files.mckinneyquiltersguild.net/uploads/1/3/0/8/130874347/joditamodajomik-wevawegakid-suvobi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/vusemugaxamexibevobutox.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/8533192656.pdf
    • https://cdn.shopify.com/s/files/1/0431/9041/9620/files/tazagorafir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/ecology_letters_impact_factor.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/wewovawaxuzuzor.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/muwowomimukukudidaje.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/osrs_kq_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/77574942276.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/57762599882.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9018/files/adobe_cef_helper.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/27590830609.pdf
    • https://cdn.shopify.com/s/files/1/0434/4859/8678/files/23780179475.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/23503506544.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b1f.bin
663738bbb2cd3eea93ed99b146d2363405187ed177c1ce20a92d5d311fede480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1F 5156 bytes
font_01_sfnt_off00007c8e.bin
b08b504cfde00c9820c536e24dbfcf4c6f804b7807662f56a8f3d8a54ca38e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8E 10460 bytes
font_02_sfnt_off0000a060.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA060 4324 bytes

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