Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3e3de023a634f7…

MALICIOUS

PDF

43.2 KB Created: 2020-10-09 01:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 385cff4d2927edc967e337bd88e4fd5d SHA-1: ca12e6327dc0b14bdd7c06c3e3ceea101d86ccbc SHA-256: 6f3e3de023a634f7a8c011b474670e6c90370c5f02b480a8f2bd84332a2d9397
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, including the primary malicious URL https://ttraff.club/pify?keyword=gold%2527s+gym+stridetrainer+380+manual. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for a manual. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to malicious infrastructure.

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.club/pify?keyword=gold%2527s+gym+stridetrainer+380+manual In PDF document text
    • http://benuped.cristinaaucone.com/uploads/1/3/0/9/130969904/ed7d2e0b9bb3e7.pdfIn PDF document text
    • http://files.boldwooddesign.com/uploads/1/3/0/7/130739889/309727.pdfIn PDF document text
    • http://files.aureliemarrierdunienville.com/uploads/1/3/0/7/130740376/86fa41ac9c60e3f.pdfIn PDF document text
    • http://maroga.pennymorrison.net/uploads/1/3/0/8/130813528/jubew.pdfIn PDF document text
    • http://files.nowwhat-services.com/uploads/1/3/1/4/131438587/nixaradiwijot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/mobujosokudonej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/the_7_principles_of_fat_burning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1497/4363/files/red_riding_hood_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249b319a-e2ae-4f57-91f4-33946fad47b1/lofuwezixilelerifel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ee5cb0-e25e-4918-8080-1958205d1428/31028889453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374b6dbf-59be-4634-9765-195e001f653c/52637975484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a405070e-fbbe-47f1-8c4a-6806864c96a5/89761250699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fad6dd1-36b7-4d15-bc5f-6703e496621d/nujezedudutuzorojog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66113642-39c5-46b3-8e3c-dba964388db0/wafegubapasop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42cb11fa-db95-4f0f-8333-aa385fc0dbf5/49255396588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71a10c0-5aa1-4379-ac5f-5f5cd1ba9e75/33281258814.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 5812 bytes
SHA-256: e45bef0000ec2e60ec08dde9437cee3f0459f4a5e7f8ba927600aa387f9bf2cf
font_01_sfnt_off0000713e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713E 14168 bytes
SHA-256: 270bf2f761cf779b66d95cfa36bec0bcfba9d910854ec065effdd81800f72028

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