Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0d4c381ce2799e…

MALICIOUS

PDF

37.7 KB Created: 2020-08-26 16:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c53bce06040ba1f4d4754cf73cd70502 SHA-1: 23f40845555d1e576cee88b292614740e0d99210 SHA-256: 0b0d4c381ce2799e67657f6421d8071060334ee6418a1b5e659cf5665fe8c7e0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, including one pointing to a known malicious redirector, and is flagged as a lure for an advance-fee scam. The document body, though heavily obfuscated, contains a URL that appears to be part of the scam's redirection infrastructure. The presence of many external PDF links suggests an attempt to create a link farm or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=harry+potter+libros+mercado+libre
    • http://files.clc-photographic.com/uploads/1/3/0/8/130814085/pusalidozezuvow-migoj-mador-vibatiwimuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/23326241156.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/31514356179.pdf
    • https://cdn.shopify.com/s/files/1/0434/9689/8724/files/nasekunonabagera.pdf
    • https://cdn.shopify.com/s/files/1/0437/2054/0310/files/acog_pelvic_exam_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/4294420242.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/carrier_split_ac_error_code_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/89812521239.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/telecharger_bible_aelf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6962/files/46763462631.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/warajawotabitelal.pdf
    • https://cdn.shopify.com/s/files/1/0438/0105/1293/files/51091373062.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/fovajudilekobosijolife.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/print_handwriting_book.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_off000054df.bin
e7d0981bb31b600fc9251638b15ea3837e9d4216e9dcdfb905d259dd3bca2197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DF 5424 bytes
font_01_sfnt_off0000672f.bin
7017fd6006c40f745aaee8057406b4a7ee033d45c58cbdc9d5d2b353eb2a5f4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672F 10212 bytes

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