Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20360bcfbdc9a91…

MALICIOUS

PDF

75.3 KB Created: 2020-11-13 20:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fa73d6d96a9ac9d1cbc1daa28c72d7df SHA-1: 789368a2a3fc0b0a92364d32523da0b0fcbb94bf SHA-256: a20360bcfbdc9a910d66305286e8b386f18d0b56b14fa218fce743b43ce57a8d
234 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of a callback lure suggests a phishing or scam attempt. The primary malicious IOC is the redirector URL: https://traffmen.ru/123?utm_term=d%2526d+nine+hells+campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffmen.ru/123?utm_term=d%2526d+nine+hells+campaign In PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/9557897.pdfIn PDF document text
    • https://sojomirolasa.weebly.com/uploads/1/3/4/3/134325131/4856432.pdfIn PDF document text
    • https://pezujotage.weebly.com/uploads/1/3/4/3/134318684/kunabodebe.pdfIn PDF document text
    • https://tokadasokavetim.weebly.com/uploads/1/3/4/6/134688198/popesediki_vogumuzalit_rijumanamezer.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/jilatek_redoboxe_jisip.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/betokojinixanuwirana.pdfIn PDF document text
    • https://zesujejiviwi.weebly.com/uploads/1/3/4/7/134729849/2177697.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/meremubabiji_vimonodofeveba_riwinob.pdfIn PDF document text
    • https://pukapukipek.weebly.com/uploads/1/3/4/6/134636258/1393b3a08fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/faluzotixupi/google_play_store_for_amazon_fire_8.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/role_of_law_enforcement_agencies.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/26028646924.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/nissan_frontier_seat_covers_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf14af92-722b-4a6f-b734-8af00110560e/14994572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ed0142-ff4b-44ae-b272-21731df9b033/74999683272.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/zapadibosewusod.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AA 3484 bytes
SHA-256: b6bc3e761eca8ae26333d0367913862b9788f7109bed8a3dd2635371d897bba1
font_01_sfnt_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 11104 bytes
SHA-256: 456658bcc9b30c60971765f0a3aab599c6c2faf353599820e3921d815300e8fd
font_02_sfnt_off000112ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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