Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec66135ed017156…

MALICIOUS

PDF

57.5 KB Created: 2020-08-24 15:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e50d0b6298b4721d6ed0c6a3ca4b7d4 SHA-1: 97dc269214d3e9188523b5bf9d5a5bd96cc50b6a SHA-256: 3ec66135ed0171569a1a85fa4674df4bad605cfc9fd2b719db0f3a5372708414
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure for 'app store android mod apk' and embeds a link to a known malicious redirector at https://ttraff.ru/pify. This indicates a phishing or social engineering attack. The PDF also contains a large number of links, many hosted on Shopify, suggesting a link farm for SEO poisoning or distributing malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support the malicious verdict.

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.ru/pify?keyword=app+store+android+mod+apk
    • http://files.fabiotours.com/uploads/1/3/2/8/132814476/6682582.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44484222312.pdf
    • https://cdn.shopify.com/s/files/1/0448/4605/5586/files/wetolal.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/nolemewetulopomudi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/vuzamowalubirozutir.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2347/files/60956685529.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6260/files/31441921614.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0210/files/my_book_duo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/dojif.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/vopagibotatolimuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/9440477945.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000624a.bin
8ca529759283f2e041c9255561457df376e9ec533eef82aecb6723d27ad8fac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624A 4912 bytes
font_01_sfnt_off000072d3.bin
306008a70edfe83110067ee43777f689c579f1de8d7c44b5363480c7ae0dbb1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D3 9000 bytes
font_02_sfnt_off000084f0.bin
d84a1f4a2d16ca72cf0ea451b9119ad5c1dcdc0ac2b84bf062b3f170b2e47ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F0 15048 bytes
font_03_sfnt_off0000b3d3.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D3 16092 bytes
font_04_sfnt_off0000c89a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC89A 4324 bytes

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