Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a36e4727060e21…

MALICIOUS

PDF

47.4 KB Created: 2020-08-07 06:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c63aed298748d863d70b167f3b58e0b9 SHA-1: da0108e378f4153ccf9f73aeef9e759bc30d29b4 SHA-256: 11a36e4727060e21ebe58e20c0fe328c1286136895f1fb070982eaaa75cc8502
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body text, though obfuscated, also contains the same redirector URL and appears to be a lure for downloading a PDF related to 'Descent into Avernus'. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL is a high-confidence indicator of a phishing or scam attempt.

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=d+d+5e+descent+into+avernus+pdf+download
    • http://wikis.streetwareaffiliated.com/uploads/1/3/0/7/130775918/2119181.pdf
    • http://files.santasacksbyreno.com/uploads/1/3/2/8/132815050/04c2e4fbba.pdf
    • http://files.mercymedicalarts.com/uploads/1/3/1/4/131406717/lilow-mufuwofenoser-sasilozifugam-pegewozalotar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/93145037484.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/slim_fit_180.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/redetoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/6740/8535/files/nobuselepolug.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/92135109049.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7959/files/weliragezawewapaxizunir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/robidavetarufugitotezaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/monolithic_dome.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/82891078863.pdf
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/rosom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf0.bin
a61a0470e0ecc7ef899458c10d13c85746e1db2903b6492d35451e1765e7ab4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 5308 bytes
font_01_sfnt_off00007f21.bin
c6484a98d725fcb82783aecb96922fc0c4b52bdb82a6d11595f71fde2b060637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F21 10384 bytes
font_02_sfnt_off0000a2a2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A2 4324 bytes

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