Malicious PDF — malware analysis report

Static analysis result for SHA-256 6895c3d0189feb58…

MALICIOUS

PDF

67.0 KB Created: 2020-08-28 00:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71d63119418c98359811d9087986382c SHA-1: deb426cdcb1ca066bdacdd12299e731d2dd9d7c7 SHA-256: 6895c3d0189feb582b9882387166399b123c8c95fd252e1fe2d5ea42a1a2cb92
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link to known malicious redirector infrastructure and a large number of external PDF links, suggesting a link farm. The document body and heuristics also point towards an advance-fee scam lure, likely intended to trick the user into clicking the malicious link. No scripts were extracted, but the presence of embedded URLs and the overall structure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=waive+notice+period+resignation+letter
    • http://files.lindsidechristianchurch.com/uploads/1/3/1/3/131379828/7851174.pdf
    • http://zagori.bsapack1hk.org/uploads/1/3/0/9/130969858/5c4d7044015ef.pdf
    • http://files.smithbrosplay.org/uploads/1/3/0/7/130739570/kujusuparejip-zovivumije.pdf
    • http://files.newyorkstategrandcouncil.com/uploads/1/3/1/4/131437538/bapemo.pdf
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1136/5288/files/library_automation_system.pdf
    • https://cdn.shopify.com/s/files/1/0439/1269/1880/files/31333309121.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/95601964245.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/screwtape_letters_bible_study.pdf
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/bukuwonadasexijonul.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/khatu_shyam_bhajan_mp4_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9631/files/unholy_dk_pvp_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/84932275110.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/zutizalu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c068.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC068 2828 bytes
font_01_sfnt_off0000ca62.bin
534621cdb210fa2d72765a1c518973af78bb560aeaaba4674e982d5b03bdd3cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA62 5312 bytes
font_02_sfnt_off0000dc92.bin
ac6a4c6f2d33be9fa23f3ee067cbb8444da8bd2f2d8080df7e329cb27692cac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 10052 bytes

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