Malicious PDF — malware analysis report

Static analysis result for SHA-256 1099df5233a8961d…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 17:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d8d7a17b168fb109f004fe987995c36 SHA-1: ae674724cb6b610659808c8da7f45b680998bd82 SHA-256: 1099df5233a8961d040e6160dbac7de6598286725a92ee24bd4c27d7f9ba7ae8
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector infrastructure (ttraff.com). The document body, though partially corrupted, suggests a lure related to 'anomaly scan report details'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm or redirection scheme designed to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious.

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=anomaly+scan+report+details+in+tamil
    • http://files.skyleblanc.com/uploads/1/3/1/0/131071289/mugunuwa.pdf
    • http://files.victoriaprather.com/uploads/1/3/1/8/131871466/nejabowogobirusefu.pdf
    • http://files.laseraccents.com/uploads/1/3/2/8/132814552/firizuvija_sixuvekemot_sivetiv_wiluzulibenub.pdf
    • http://files.kaelaskakes.com/uploads/1/3/1/6/131636697/74723fd2bd949a.pdf
    • http://files.shannonsbling.com/uploads/1/3/0/8/130813079/zunad_wajominefagezat_zorodajuvosekif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/zerusajuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2771/files/69364200622.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/sorting_algorithms_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/gekoxiliwabuxatakugizowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/telaroninotetisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5298/0641/files/48498643547.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/7656664205.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/13363870888.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ca.bin
966ede9fca83ab2aed63cbf4c36a15c5ea65d75880623bab0338bedaa8eee1e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CA 5096 bytes
font_01_sfnt_off000074ff.bin
0cd8c3079e8c7e6735488395565178718e05365cca266123151efc178af0ef24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 10336 bytes
font_02_sfnt_off0000983a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x983A 4324 bytes

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