Malicious PDF — malware analysis report

Static analysis result for SHA-256 705aed672ff0b316…

MALICIOUS

PDF

53.2 KB Created: 2020-09-07 02:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fb793975a7d183da3b5e3693d74bd3c SHA-1: 023b9abbef862d5d317df1233d6d3f20488ac9a8 SHA-256: 705aed672ff0b316def9feb7c08500dff36114dc95ba41e0f754ff4225ccb878
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also attempts to trick users into revealing sensitive recovery secrets, a common social engineering tactic. The presence of numerous external links suggests a link farm, likely for SEO poisoning or to distribute further malicious content.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.club/wix?keyword=affinity+water+domestic+leak+allowance+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/270e53_4c8bc5e923154c56bd511d64237cac65.pdf
    • https://static.usrfiles.com/ugd/5bb01c_6ca4a3ed57564ef7898f61ddb314e305.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2f482353dc9401d8619a086b667ae32.pdf
    • https://static.usrfiles.com/ugd/0c4177_aaaaf76153414c209f8972ed3e754a40.pdf
    • https://static.usrfiles.com/ugd/3ed902_3efba1da9425478da2a84a47fcab317b.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/31253945522.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/39632795320.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/gusetowomominefegumoteda.pdf
    • https://cdn.shopify.com/s/files/1/0431/9477/7757/files/11207855335.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/bodorule.pdf
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/jakipegowowivodalepivutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7741/files/fda_haccp_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5841/files/fifivivijamexofakav.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_off00008c29.bin
8d1aa1046da2bb8506e6f3b086502f53974c37c93ceb9e2e85ed90adbddf93e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C29 5412 bytes
font_01_sfnt_off00009e9c.bin
ae4437c1218af9bd97d71fb215aa5bc4718050379a4c98e0be1da1f82c627790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E9C 13080 bytes

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