Malicious PDF — malware analysis report

Static analysis result for SHA-256 203206771b919fde…

MALICIOUS

PDF

38.0 KB Created: 2020-08-10 17:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0a6db60337efb3e9b0e742e64806273 SHA-1: a959e67dd6de95b178b84ff7ecaf937cc4dd41e0 SHA-256: 203206771b919fde472851bb9761203845bacbe836a60da036806c5420972172
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body and heuristics indicate a lure related to 'Accsap pdf download', suggesting a phishing or scam attempt. The presence of a large number of external PDF links, many hosted on Shopify, further supports the SEO-based link farm tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=accsap+pdf+download
    • http://files.ldcustoms.com/uploads/1/3/1/4/131438443/bd077e3a52ef.pdf
    • http://wabisiba.ildanceofficials.com/uploads/1/3/1/6/131606289/fejor.pdf
    • http://netefiv.hopeofglorychristinmebriankinnett.com/uploads/1/3/1/3/131380126/8502417.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/nhtsa_sfst_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/rufodobapegarojitoxojafi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9725/8136/files/bunozefalegobiza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/dunefudotorerokopaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/74384545759.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/list_of_spelling_words_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/0091/4343/files/hot_wire_anemometer_thermal_method.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1265/files/fedavukupixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/lonukaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/amazon_vision_statement.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/acta_constitutiva_de_sociedad_civil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/sosebet.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_off00005449.bin
b977a8c168882d06d9ce02241cdae90a62f452510429322383ead44bc78108b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5449 5136 bytes
font_01_sfnt_off000065df.bin
aa57364a0c6836f6e8f1538ff8b7b8958d59aec2a6316882401039373824f3c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 10952 bytes

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