Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fac90fa284ad928…

MALICIOUS

PDF

47.3 KB Created: 2020-08-24 15:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e44175faee9e94afe35f3bec65fdf2bd SHA-1: c9ecb337df79ff5e2489f8a6e6e4d21149874ad0 SHA-256: 7fac90fa284ad928370e87cfcc6c0ca66b711707ed52ff8a3a7226928e933e8b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a Docker installation guide. It also features a large number of links to other PDFs hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious destination. The presence of a "SE_MFA_LURE" heuristic indicates the intent to harvest credentials or abuse multi-factor authentication, likely through the linked redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=docker+for+windows+10+installation+guide
    • http://repogirin.msportsix.com/uploads/1/3/1/3/131379530/f2855f222ca01a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/85440278718.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/89508429739.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/sewogalivikibegazus.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/18818061152.pdf
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/94327319145.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/kirchhoff_s_junction_rule.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/gokixefuzuwemanibunedato.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/50198145941.pdf
    • https://cdn.shopify.com/s/files/1/0431/7308/5341/files/xinudomijatuzirel.pdf
    • https://cdn.shopify.com/s/files/1/0454/7431/6454/files/89910715181.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/lopakotimovevasekozopoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/0259/2410/files/fixirer.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/bemewivib.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079a1.bin
fcb13420099037cd63a2e82afa35374a138fe8add939852cdef3fec938ffc99b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A1 5540 bytes
font_01_sfnt_off00008ca1.bin
c9dd7081acf1e4f0bf781905a6bd13d82bacb18eb44094d19cdfa7cd5a9c9e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA1 10416 bytes

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