Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a12539ff981d70…

MALICIOUS

PDF

46.2 KB Created: 2020-09-16 23:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00aeea6dbbc09195cb433d91a5280dd3 SHA-1: 15046f9a14db087b776a2a3c115b32beb7683295 SHA-256: 63a12539ff981d702e1cb72631334449085e0521458a97beee26bcde84400cb4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same keyword as the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to distribute 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.me/wix?keyword=master+mechanic+salary+bmw
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://46bbc3ed-7914-4a92-9480-8f92c23517a7.filesusr.com/ugd/7baf93_4c5ec8c6610f4ab9804db45a9d09ff24.pdf?index=true
    • https://3a4ed9d5-2b34-4250-bd56-905de1766ea1.filesusr.com/ugd/d38238_b24a6e7f21d1415bbab37de6b5ea7f1e.pdf?index=true
    • https://3fb053bc-d5ea-49e6-be4b-c93500e310b3.filesusr.com/ugd/53c654_012880003209489188bb05e68faf84ed.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/vaxuranajipijaniwovuduxel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/78617119038.pdf
    • https://cdn.shopify.com/s/files/1/0437/6736/5794/files/quarterly_financial_report_example.pdf
    • https://fef10a84-4a4d-4971-830a-c214889cad38.filesusr.com/ugd/6f9b04_f2f11ba3f4264dc1bad33fb7ed053ced.pdf?index=true
    • https://f3a304eb-72b6-4a88-bc7a-d40f9afc5939.filesusr.com/ugd/9cfd0a_38b960ee4f924d56a5ab2ff38b773aa7.pdf?index=true
    • https://7f745f43-333e-4467-a96d-2a0e28ded42a.filesusr.com/ugd/23a6c3_cfd7612844d241d4a9339e44cf0785c9.pdf?index=true
    • https://dc99b820-f973-4c20-a9a5-5e340e392d28.filesusr.com/ugd/ab922d_b8d33502e2204e669069b4a96a357f03.pdf?index=true
    • https://e218af7d-9d7b-441f-958a-f43aa634fe59.filesusr.com/ugd/b13fd1_c93d1d8678554b8db2420cea86323a32.pdf?index=true
    • https://33f07765-ae8f-4e98-b02d-1c4aeb703797.filesusr.com/ugd/6e2da7_9999ea9799f74b26bd465cc65ca4fe91.pdf?index=true
    • https://ba5a8165-e854-46bb-9700-e626054fe079.filesusr.com/ugd/c79b1c_2acc549dd98e4940be546b6dde5fa418.pdf?index=true
    • https://0e63bded-a681-4f47-a747-04eaeb749e93.filesusr.com/ugd/61b8bf_cab0274edc814600933b3106e567d856.pdf?index=true
    • 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_off0000692e.bin
f38e327eb9b9502392ac6f0845d2fd8eb326e7d5cd4393a2a27d7788f1a1d8ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692E 5056 bytes
font_01_sfnt_off00007a39.bin
1f96ab8d7da4f8fca743588fc905c4167072b8f8baed0d82b0d1f7d239c641b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A39 10408 bytes
font_02_sfnt_off00009dd4.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD4 4324 bytes

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