Malicious PDF — malware analysis report

Static analysis result for SHA-256 797db13adb6cd63a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-11 04:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe493fc3e5ddb15e6719b212a569700 SHA-1: f9005d2c0a1bb445733b0b811eed9aaa6cf9eb0a SHA-256: 797db13adb6cd63ab92983395c5faf71d7772384f3049231a22c2350872f1c95
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are hosted on Shopify. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=axis+mutual+fund+form+pdf', suggesting a lure related to financial forms. The presence of embedded URLs and the ML classifier's strong positive prediction indicate a high likelihood of malicious intent, likely for phishing or malware distribution.

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=axis+mutual+fund+form+pdf
    • http://files.hunterhartman.net/uploads/1/3/2/7/132740606/c2e7f1ba.pdf
    • http://files.whatsthestoryla.com/uploads/1/3/0/8/130874526/newido_roparegi_katow.pdf
    • http://files.bolsterrogers.com/uploads/1/3/0/9/130969532/mobeke_zodok_vikokemazaf_gukot.pdf
    • http://files.northmayohorsesanctuary.com/uploads/1/3/0/7/130738566/898aef3cd.pdf
    • http://sutib.seekhaven.org/uploads/1/3/1/6/131606938/fawufixodireloparupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/ludokideweluf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0848/files/59148919789.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/mazuzozog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/30973936718.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4843/files/49399961679.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/acrobat_reader_download_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/jenulutosivisilap.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/gozazoxumewokamote.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1607/files/mapa_metra_budape.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/39152034314.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/pumitetodesejizuto.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/soil_nematodes.pdf
    • https://cdn.shopify.com/s/files/1/0443/0761/1804/files/hp_12c_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006915.bin
7f3e2edf90e06f2f042679e9dd3cab28a9f43e2faa6f7b96592f64aef7361b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6915 5244 bytes
font_01_sfnt_off00007ad1.bin
3e3518f85f59b6a141933ef2769c26d5a00255b106491b46b57676729013318f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD1 10496 bytes

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