Malicious PDF — malware analysis report

Static analysis result for SHA-256 64524648282547a7…

MALICIOUS

PDF

49.8 KB Created: 2020-08-21 23:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eadb432ae97e26138df35ca882abccfc SHA-1: 69f9fcf0c0b8ce5836b10f7859b696059cafdd32 SHA-256: 64524648282547a77d15e6f684065036543f0a0b97aa6b868f2e914d63b7eb3a
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 Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely intended to lead the user to a malicious payload or phishing page. The document body, though heavily obfuscated, contains the same redirector URL and a reference to a 'metric conversion worksheet', indicating a lure to disguise the malicious intent. No scripts were extracted from this sample.

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.cc/pify?keyword=metric+conversion+worksheet+unit+introduction
    • http://vunesig.motionoflife.net/uploads/1/3/0/7/130775350/a2e310.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/periodicity_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/waxelabimukamisa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/kabarakawovoba.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/wedding_declaration_of_intent.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/gopuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/sound_absorbing_materials_zwikker.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66491839223.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/printable_yearly_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5993/files/94372101431.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/70094484513.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/tujuan_anamnesis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/43699651491.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_off00007abb.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABB 2828 bytes
font_01_sfnt_off000084b6.bin
da2a50bac3cb51e68c71bdcbc6fed43146b7839c21e35ef5a2547e95ff664867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B6 5008 bytes
font_02_sfnt_off000095d2.bin
b635d038508ed34b7e4cfb119e72d50ea1799d9cf016012d8d08afdd7eb518ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D2 9876 bytes

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