Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a88cd8ce0ccb650…

MALICIOUS

PDF

61.4 KB Created: 2020-07-26 20:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4d55d847e590e702edcc0697ff50d7f SHA-1: 334924ae6e223302e818145c2c72d696b2d3b45b SHA-256: 6a88cd8ce0ccb6500022ad6653cb4ac0b7f4c9232f423cd8d60576a14116be30
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external PDF links, characteristic of SEO link farms. The document body, though heavily obfuscated, suggests a lure related to a prize or parcel delivery, aligning with advance-fee scam tactics. The primary malicious IOC is the redirector URL, which likely leads to 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.com/pify?keyword=angular+datepipe+format+not+working
    • http://files.elawrencecpt.com/uploads/1/3/0/7/130775653/9860076.pdf
    • http://files.silverrunceramics.com/uploads/1/3/0/7/130775659/banupixijaw-mejejaterus.pdf
    • http://files.baltzelllodge.com/uploads/1/3/2/6/132681479/3946295.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4290/6007/files/jafewibudela.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/jituxonivowutumenug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/18096417233.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/52140575984.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/taziruvefonigujelovofuge.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/77355903022.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/60847022713.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/posaviko.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/tusivalisor.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8789/files/bikobepoximo.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_off0000b38f.bin
0717a6f23e688b7afc1fbdcc4e389c409853786ad7ecb852c201dad9497dd641		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB38F 5208 bytes
font_01_sfnt_off0000c543.bin
42c89067b168418490fb33ac1971132f8000811d098a95f7538acf7bcddca8be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC543 10264 bytes

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