Malicious PDF — malware analysis report

Static analysis result for SHA-256 19167d68e5228d2e…

MALICIOUS

PDF

50.5 KB Created: 2020-08-17 03:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e253a66e70d8d2f30a2706949fd2e96c SHA-1: 7d860f44ec7754258c3f67924a07d2505a73d1c1 SHA-256: 19167d68e5228d2edd4123d919f5ceca59e0cdf196de764d95bbe750852a2b15
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 'ttraff.com'. The document body, though partially corrupted, contains text suggesting a lure for a 'confidential report'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, including one that leads to a Shopify domain. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=confidential+report+1955+watch+online
    • http://files.redwoodsafety.org/uploads/1/3/1/3/131380263/padiwad_jozejikonowip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5371/9453/files/xekevebutafiselom.pdf
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/able2extract_professional_to_excel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/turn_on_your_lovelight.pdf
    • https://cdn.shopify.com/s/files/1/0436/1433/9235/files/auto_detailing_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/sizukokuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tunamowari.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/75472218918.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1926/files/zetunekodobojaguz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2565/2117/files/maestro_ozawa_crossword.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/gufixakoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/tamonamigevorafib.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_off00007a16.bin
1beaf585df62b02d78f1e189b09231120cabebadecba14d4eade16e7f187ba8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A16 5300 bytes
font_01_sfnt_off00008c34.bin
aa799df7e27bd233ae3bc0ff654180f0c471d3f20a6a0b0c90d5fa3f5006a4fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C34 10300 bytes
font_02_sfnt_off0000af55.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF55 4324 bytes