Malicious PDF — malware analysis report

Static analysis result for SHA-256 078698956a17ca4e…

MALICIOUS

PDF

46.2 KB Created: 2020-08-04 05:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1623094333d06baca4ffa6cd7d45316b SHA-1: 1f1b886a16b59f3ca3b9da7b7c132eb842c7ce86 SHA-256: 078698956a17ca4e6c80c103d6712bc1bb21939f7ca4de4f74ced1e83dbe5dd1
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to a known malicious redirector, and is flagged as an advance-fee scam lure. The document body, though partially corrupted, contains text suggesting a proposal letter, which is a common pretext for such scams. The presence of a large number of external PDF links further indicates a link farm designed to obscure the malicious redirector.

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=example+of+proposal+letter+pdf
    • http://files.solsticevocalarts.com/uploads/1/3/0/8/130873855/xonejivuvezuk-rigegaruxop-xireli.pdf
    • http://files.disabilitysupportcalderdale.org/uploads/1/3/0/9/130969960/656962.pdf
    • http://files.throwinabird.com/uploads/1/3/1/3/131380177/sogagudu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/torujipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0968/files/rizaxerizot.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/37074841676.pdf
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/92321079809.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/29204964532.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/dudizaxivalamupibixol.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/49183739619.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5082/files/wifuwujizovo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4013/files/33809434941.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/kigawuzeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/xobigumisiniwozel.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_off0000770e.bin
7ed326c5ea129f8d6c0ab2a94b2707e8407c80dceb1a72660364fd258a8aa411		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770E 5212 bytes
font_01_sfnt_off000088b8.bin
715f926763b620e1fed635459bd09e6db277caa84c48097fb7e55e9ef1258314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B8 10372 bytes

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