Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fc1941532e2148…

MALICIOUS

PDF

45.8 KB Created: 2020-07-30 03:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dabea66edc5bb17d4a2f87ddc646d3b4 SHA-1: 395faf0379cb1e3214a76ea15d8ece6ad82f3938 SHA-256: c7fc1941532e2148fbd43e6ea3f90c6a8e98ceb01436af9199b849d76400114a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious and contains a significant number of embedded links, many pointing to a link farm hosted on cdn.shopify.com. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.com/pify. The document body is heavily obfuscated and does not provide clear textual clues, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

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=acquisition+and+processing+of+marine+seismic+data+pdf
    • http://files.synergisticstemoutreachcenter.org/uploads/1/3/2/7/132712234/2148053.pdf
    • http://files.the60four.com/uploads/1/3/2/6/132681464/94fd7bb.pdf
    • http://files.david-jones-society.org/uploads/1/3/0/8/130814642/dixagululekivex_tekixomixe.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0429/6228/8793/files/taxonoderekumil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/31108609680.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/76275965614.pdf
    • https://cdn.shopify.com/s/files/1/0432/8715/0752/files/79178668914.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/pexorijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2228/5976/files/95352270802.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3369/files/joragorupegitapag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/bosapovobilavesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/tubiwirugavalu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/kavomovupekazejijirezawu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074d4.bin
7a66376a2a747f8836b074278a5077aa9c6762cca92308c7ceecacf215890b44
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 5440 bytes
font_01_sfnt_off00008737.bin
a59be7907147f761e39733564b08b977443e1b898f96a54739d0ab91f1028ac2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8737 10160 bytes