Malicious PDF — malware analysis report

Static analysis result for SHA-256 92aa3c7717cfac92…

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 18:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e2747120362c97a74cfb7d2e54a73ae SHA-1: c3eba549dabe9738caf02268733ff14a45f1d419 SHA-256: 92aa3c7717cfac9280d39268b43d4da0acefa43ac11ece102f31d909403e04ff
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to `https://ttraff.cc/pify?keyword=aguila+dorada+bis+horarios+formosa+posadas`. This redirector is known to lead to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL is the primary indicator of malicious intent.

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=aguila+dorada+bis+horarios+formosa+posadas
    • http://files.empactathletics.com/uploads/1/3/0/8/130874163/2093009.pdf
    • http://files.peterobot.com/uploads/1/3/2/7/132741029/8989292.pdf
    • http://files.lincs-cabins.co.uk/uploads/1/3/2/8/132814465/940a1869c28c7.pdf
    • http://bopemino.markhamgolf.net/uploads/1/3/0/8/130874317/2924534.pdf
    • http://fobiz.questgenealogyresearch.com/uploads/1/3/0/9/130969791/tipukawalomo_tolitide_fofegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/temoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/basic_music_symbols_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/zuvosiviri.pdf
    • https://cdn.shopify.com/s/files/1/0461/1227/6644/files/neleveritugagedukiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/29851570933.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/fewid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/40013758491.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/85391768598.pdf
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/maplestory_2_runeblade_attribute_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/dr._simeons_hcg_diet_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/pugojax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/80095387243.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_off000056f0.bin
6f8cafc02a8ab03cf8f175629a7cb28dfe3b7f596f5b4e0472b41bdbe763205b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F0 5584 bytes
font_01_sfnt_off000069c0.bin
8b546fb36b4914a4d8aec650825e5f7051e99424f3032eeeef11523d817e1d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 11456 bytes

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