Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf0b5fd08e817f5…

MALICIOUS

PDF

94.4 KB Created: 2020-08-13 21:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4325614087654e530094099c252bf206 SHA-1: 5c95434f0a9f82945ddd3ce83999ac15321d3350 SHA-256: daf0b5fd08e817f578d62403caa50c108db3e5c0d0049ec2a8b78642aa5e717a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=iron+jawed+angels+worksheet+answers'. The document body, though heavily obfuscated, appears to contain the same keyword phrase, suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links, many hosted on shopify.com, indicates a link farm strategy to improve search engine ranking and distribute the malicious payload.

Heuristics 3

  • 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.
  • 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=iron+jawed+angels+worksheet+answers
    • http://files.basic-foundations.org/uploads/1/3/1/4/131453843/e09684f5ae5c46a.pdf
    • http://files.chapman-bond-chatman.org/uploads/1/3/1/4/131409309/nowovijavejub.pdf
    • http://files.kickflys.com/uploads/1/3/0/7/130776712/7cd3ab57.pdf
    • http://files.support.famhealth.com/uploads/1/3/1/4/131437740/3357936.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/online_books_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/exclamatory_sentences_examples.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/joveg.pdf
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/nationalist_movement_in_west_africa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/wisezuzutipokomutogitegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/malcolm_bradbury_the_modern_british_novel.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/auguste_comte_livros.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/xagirakuzawujomigoben.pdf
    • https://cdn.shopify.com/s/files/1/0437/4223/2725/files/23791691829.pdf
    • https://cdn.shopify.com/s/files/1/0438/2153/1293/files/mathematics_grade_12_question_papers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2228/5976/files/49291146604.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/sleeping_beauty_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/8562/5499/files/bob_ong_si.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124e7.bin
d16c34e5825c98e7d5d724bd21791841ba00aea8b5b637f57ffaaddb0082e994
pdf-font-stream PDF embedded font (sfnt) at offset 0x124E7 4996 bytes
font_01_sfnt_off000135f0.bin
47570bd1e424d8b1ce06b7873ac32a64259913146057ecd4f514ceb52513a142
pdf-font-stream PDF embedded font (sfnt) at offset 0x135F0 11636 bytes
font_02_sfnt_off00015d42.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D42 4324 bytes