Malicious PDF — malware analysis report

Static analysis result for SHA-256 036ffe88f2c1a65e…

MALICIOUS

PDF

68.6 KB Created: 2020-08-15 07:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49aeff3097583f3f1abae6a3f9c0dbf6 SHA-1: 2354608549a594b1b6a34930f736dcdf58c6a122 SHA-256: 036ffe88f2c1a65e070964e1bd9b6a9d69356c040175ca6bf53add1bb14c2165
194 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and part of an advance-fee scam, using language related to payments and reports. The document body, though partially corrupted, contains a URL that is also flagged as a malicious redirector. The presence of numerous external PDF links suggests a link farm used to distribute 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=annual+trustee+payment+report+information+2018
    • http://files.normrapp.com/uploads/1/3/0/7/130739116/ganufavav_jeruraba_wopefebigukaxo.pdf
    • http://files.alittlelively.com/uploads/1/3/2/6/132681443/a62f7ac353b5.pdf
    • http://files.coolbodz.com/uploads/1/3/0/9/130969811/1096209.pdf
    • http://gekufu.adambenham.com/uploads/1/3/2/8/132814930/dewikop-sifijibef-sojan.pdf
    • http://files.thomasingmire.com/uploads/1/3/1/3/131378835/pewig_xetarak_vavubanu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/jimufiliwez.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/3811229858.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1041/files/bozobolirigokipalulunova.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/1139980643.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/papizopuvonewamezinovefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/basic_pl_sql_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/silent_reading_vs_reading_aloud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/filizopuluxipawimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/b_tech_information_technology_salary.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_off0000cc7b.bin
8daeebb2abc7138799d6b9b6511b2c037dffaec1415fbae970dde57405b713d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7B 5660 bytes
font_01_sfnt_off0000dfb2.bin
eee74cfa7a77d141f15f60e52959d34fd9adaaf850c97c923c4157a31b1ee71a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 10960 bytes

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