Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58b7cbf7dd4370a…

MALICIOUS

PDF

36.3 KB Created: 2020-08-01 17:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26495c73922e96132d2973bba51fc6c2 SHA-1: 7447c2eae4abe98be66e8dd744cdd3c6846c842f SHA-256: d58b7cbf7dd4370aa6c17173cfb62f6b2a59de4900554a322b23ed5f3c33afc7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same redirector URL and references to downloading content. The ML classifier strongly supports the malicious verdict. 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=download+truffle+butter
    • http://files.ycheerioschallenge.com/uploads/1/3/0/7/130738852/b589b8353879a69.pdf
    • http://files.shsparentassn.com/uploads/1/3/0/7/130739480/pigerifebel-xibaxovabawip.pdf
    • http://files.firhouseetns.ie/uploads/1/3/1/4/131454238/jimivoxu.pdf
    • http://files.mitemplosagrado.com/uploads/1/3/1/6/131606502/movomazol-bobabos-xofeju-suzipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1620/9059/files/81458337329.pdf
    • https://cdn.shopify.com/s/files/1/0434/4371/6262/files/56547327939.pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0983/files/31538681654.pdf
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/41154927203.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/3233300278.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/94719472127.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/budazasinopuxa.pdf
    • https://cdn.shopify.com/s/files/1/0441/2620/8152/files/john_deere_lt155_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/beluboxifamutivuboxasu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/jupavu.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_off000045d9.bin
5d24cd1bac62695ec43a706a69ca78c86c0c5e8a18d7a96c3301ac65f212cb7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x45D9 4952 bytes
font_01_sfnt_off000056d9.bin
90e2e77ed316c91758236b953d59fbf6597c1e1434733d3d22b1b2d86cd98714
pdf-font-stream PDF embedded font (sfnt) at offset 0x56D9 14048 bytes