Malicious PDF — malware analysis report

Static analysis result for SHA-256 63154f4812a3293c…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 13:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a435abb6e9dae5a99cc562fa874209 SHA-1: 070f876ad73b58f4f2bf4114103732980fd75e72 SHA-256: 63154f4812a3293c49c6bd47fbeea52ebbda7f4f3df6075765d4c09d10da5880
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though partially obfuscated, includes a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of multiple malicious links is a strong indicator of malicious intent.

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/pify?keyword=mariamman+kummi+pattu+lyrics+in+tamil+pdf
    • http://rizoru.artworkbyrachelsellars.com/uploads/1/3/0/7/130776760/dazofolan.pdf
    • http://files.testingequipmentstore.com/uploads/1/3/1/4/131455832/talutekavut-kudareko.pdf
    • http://logozuno.jbirdmultisportcoaching.com/uploads/1/3/1/1/131164250/kifava.pdf
    • http://files.sbvcpsychonline.org/uploads/1/3/1/4/131406649/1934281.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/81952709046.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ridojunewosinojep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56966684837.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/rogagakeboninazutotujesa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/isaac_asimov_ignorance.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/zikevejeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/bebuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/moralevarosuvizivikozep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2102/files/vertical_farming_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0433/7637/8014/files/werewosogijem.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/15315489622.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047ed.bin
423b6783c3415d5f6b28f27adc7c07180af49afa11dc0600f767f00a03172c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47ED 5128 bytes
font_01_sfnt_off0000593e.bin
ac98978dbba88e4cad706014497a8b28045fa2420e8f509a870f2f6f045d8146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593E 8680 bytes
font_02_sfnt_off00007232.bin
e6107052b67d4556f09b05461ed3406914b01c12ca1e8963b5c8faa79f59d3b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7232 10092 bytes
font_03_sfnt_off000094aa.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94AA 4324 bytes

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