Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56546966db3f931…

MALICIOUS

PDF

38.8 KB Created: 2020-08-21 11:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f86dd4bf77861d0baad19a5534311e70 SHA-1: b7f153e18e3da5b2b6548bed9314ad9db3e1beef SHA-256: c56546966db3f93101f199e9268be5583649ec8823d4de527f37cc158aa95b60
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to host malicious content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=aankh+maare+video+song++3gp+tinyjuke', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the link farm and redirector suggest a delivery mechanism for 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.com/pify?keyword=aankh+maare+video+song++3gp+tinyjuke
    • http://kafibala.goldenpandarestaurant.com/uploads/1/3/0/8/130813650/duzuninat-zapiwokuzew-jorigijomuvowij-jekeragob.pdf
    • http://zamigegez.gratiotdems.net/uploads/1/3/0/7/130776485/vagebipo-relojun-nexotilopa.pdf
    • http://zapop.winningmentalitygroup.com/uploads/1/3/0/7/130740206/zuseged_rogiguvuxod_pupekolodugulum_regaka.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/vudekogigasegasogusujot.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/21728556612.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/medical_microbiology_greenwood_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/wufujokepafejus.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/33295273378.pdf
    • https://cdn.shopify.com/s/files/1/0465/2407/2086/files/ldaptemplate_search_example_spring.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/60142273315.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9766/files/ralazomoxefotowuxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/62054273658.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/jorovedifetepakerix.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005785.bin
3a2a9f9985bdf573af6a027f5b805dc298a51d69aef147605c1c750c083a446c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5785 5796 bytes
font_01_sfnt_off00006b25.bin
4aef22571b0d6c9e8afe7d2f8e2b895dddc73c05450050370672e2c1301ba3e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 10320 bytes