Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bac7d3d4e7546f2…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 05:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2c784477649f879b422f73f853cf4ca SHA-1: 2714525cb089d058e9e8560a1914d81392e1c6d5 SHA-256: 9bac7d3d4e7546f2c2851a36c984bd47d93b9c1f5121b01c6c6b9152066fb349
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=best+professional+answering+machine+messages'. This indicates a phishing or social engineering attempt. The document body also contains this URL, reinforcing the lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the primary attack vector appears to be the malicious URL embedded within the document.

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=best+professional+answering+machine+messages
    • http://files.benevit.org/uploads/1/3/0/7/130776518/a080a28e.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/rabodarog.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9203/files/79283340885.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/gowuguvubopukaxumavure.pdf
    • https://cdn.shopify.com/s/files/1/0437/3656/3866/files/how_to_setup_blue_snowball.pdf
    • https://cdn.shopify.com/s/files/1/0440/6909/3541/files/ketez.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/neon_trees_animal_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/1048/9496/files/beat_it_tab_solo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4850/8311/files/battery_university.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/89318995367.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/penyebab_amenore_sekunder.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/beedi_scholarship_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/financial_accounting_multiple_choice_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/pujavexesininerifux.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_off000068ad.bin
b017909a29a735b8080ace95fd6893fe0e57a8d51c1ea373347391ccdb9a8df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x68AD 5568 bytes
font_01_sfnt_off00007b88.bin
851499beebfb8a35f865c7fa3dd907cc4575a84af4c71ecb55e4254d4c89f2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B88 10424 bytes