Malicious PDF — malware analysis report

Static analysis result for SHA-256 9670f5d6ae5bf804…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 13:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e2ec4193cf81c90da8d3eb1e96d64eb SHA-1: 340a9436c69b3cb3617ad6d35f5076166e9b9f82 SHA-256: 9670f5d6ae5bf804f75e8253a3b8dd68173022240e990f63b5bfe3298e987e58
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to 'streaming platforms meaning' and the URL itself, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=streaming+platforms+meaning
    • http://jakafeguk.islelander.com/uploads/1/3/0/7/130740178/kiwevufaxazafasagi.pdf
    • http://gemuz.drcogleysinnovations.com/uploads/1/3/1/3/131379803/wozagep_sukiragor_fitaluvatorenog_waropid.pdf
    • https://cdn.shopify.com/s/files/1/0437/1634/6007/files/mofuwe.pdf
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/mokomim.pdf
    • https://cdn.shopify.com/s/files/1/0440/9052/3813/files/kolajubibefupinoruko.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/etiology_of_mental_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/97769388893.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/navemiwedofaximi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/proposal_penelitian_tentang_bahaya_merokok.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/48311158129.pdf
    • https://cdn.shopify.com/s/files/1/0438/3195/1517/files/autodock_vina_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/dizatok.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/ottoman_empire_history_download.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_off00006082.bin
51485f99be25ee818c8abe78435cc66e0d43f5107fe0af98c88c7cee3fbfb2a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 5324 bytes
font_01_sfnt_off00007282.bin
04f062517cfc74976d0d265ab4f384b2db164549c124a34d0b13a79d0b8834a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7282 10252 bytes