Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b366992252fdb4…

MALICIOUS

PDF

40.1 KB Created: 2020-11-02 08:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3c3902efdfba23ab33d2096e54a7c735 SHA-1: 0c530dd02a24018b60df0290c1c1e56f1588a7b7 SHA-256: 40b366992252fdb48901b7b545ea50cb38133693012b9437549f6dd37c903789
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains numerous embedded URLs, with the primary one being `https://ttraff.com/123?keyword=comprehension+questions+a+jury+of+her+peers`. The presence of a large number of external links suggests an attempt to manipulate search engine rankings or direct users to potentially harmful content.

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://ttraff.com/123?keyword=comprehension+questions+a+jury+of+her+peers In PDF document text
    • https://ramipataxeki.weebly.com/uploads/1/3/4/4/134483057/sidagewabol.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/7ce3b8.pdfIn PDF document text
    • https://vujofuda.weebly.com/uploads/1/3/4/3/134375628/97d8ba0729cb6.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/f16fa4a15ea56b.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/5769683.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/a8fa3155.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/vapelurowar/64817604603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3497/9751/files/41557892910.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/cordon_umbilical_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9192/8249/files/lizaxabifakegotoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7332c55b-341d-4618-9f8b-62a4e47d0709/the_girl_next_door_full_movie_2007_f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5632b7dc-f61c-47fb-be40-f528c8c15012/dinoguzepetivijolonan.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/ruxaketitexalirelunebimis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1288/8982/files/gojifimakelerikezarenuwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8220/9181/files/6970491732.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/53246522966.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_off00004ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF1 5316 bytes
SHA-256: f7f9a113a6c89d834b75e60daf26e45572c5a289ab597903c5ab81190b93dd8e
font_01_sfnt_off000061eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 10268 bytes
SHA-256: ee3d5c181c3dab3a57b38fc506b7700c6542ac49278848172b7735a8e84e6345
font_02_sfnt_off00008515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8515 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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