Malicious PDF — malware analysis report

Static analysis result for SHA-256 b170f25ef145f696…

MALICIOUS

PDF

38.9 KB Created: 2020-10-27 21:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2ef2410988d7955822c455f3571585c0 SHA-1: daff7673e3a4ed99781f940c96a6f52cdf6f8431 SHA-256: b170f25ef145f69629e94ac5f0a44d007f68d5d66a9d46819439d5d558874418
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to direct users to harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?keyword=elton+gregory+middle+school In PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/timibitedixepo_nelideredawexot_nuzibe_valebir.pdfIn PDF document text
    • https://loxuvamozevu.weebly.com/uploads/1/3/4/3/134310095/nusaleleleb_kusewajapoxa.pdfIn PDF document text
    • https://wusiparopebabo.weebly.com/uploads/1/3/4/5/134505529/e7303d.pdfIn PDF document text
    • https://waxovidimised.weebly.com/uploads/1/3/4/4/134446407/gutofu.pdfIn PDF document text
    • https://jokepalebaja.weebly.com/uploads/1/3/4/3/134360350/9080497.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/tufareralew-soxom-fugiravafujipob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6693/9799/files/solving_rational_equations_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8891/8724/files/fromm_dog_food_feeding_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0986/7416/files/94310389206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8541/2546/files/86986720429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5248/4766/files/7865830422.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/62567671474.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/86603688550.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/verbal_abuse_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/drama_script_on_social_issues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7237/0326/files/39996445815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3178/8182/files/74863860392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/zafizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9622/7015/files/momizuzasaromid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6572/4059/files/logo_modernism_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/official_act_prep_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6552/6422/files/peveninojuwipunevop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8986/9991/files/convert_to_pptx_editable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/30667522220.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000574a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574A 5200 bytes
SHA-256: 2247bf81a23a24400ca64de1a4e1520cc3b543c6310c0a1523aec5eb91482ade
font_01_sfnt_off000068df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DF 11264 bytes
SHA-256: a55e3a410694cd04fc7861c20a97ca2f0250d0a1329b11933d7d5880d045d173

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