Malicious PDF — malware analysis report

Static analysis result for SHA-256 e722300bd9171f1d…

MALICIOUS

PDF

55.9 KB Created: 2020-08-14 12:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a85dee8341d3cfec43cca38573dbcd2 SHA-1: 3fd14ee8cb9ada6a4d11e097c40ae20e79955a5b SHA-256: e722300bd9171f1d707790e57bf721d40d7b90755d475619b93c2a637573330a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains the same text as the malicious URL's keyword parameter, suggesting a lure. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, indicates a link farm designed to attract search engine traffic and potentially 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.com/pify?keyword=full+form+of+atmosphere
    • http://files.yogabythestars.com/uploads/1/3/0/7/130776594/8729879.pdf
    • http://files.clairefreeman.me/uploads/1/3/1/3/131380345/99828513bd.pdf
    • http://files.freedomk9s.com/uploads/1/3/2/3/132303019/5331597.pdf
    • https://cdn.shopify.com/s/files/1/0437/1746/0120/files/guzazuluxulek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5866669006.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/jozatamumalipirekunanuvuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/equilid_50_mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0430/3706/5370/files/string_theory_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/souncloud_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/alan_gratz_allies.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/28629101745.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/16248953382.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e00.bin
9f7f16bad19b525a0673417cc88de8a15059b4d81d97d1bad997a5be6ce27ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E00 6776 bytes
font_01_sfnt_off000084ef.bin
f2451e32e50d781d1f4fdaa5fafbb4f1980344eea59b8aba664c8bbedd2d757b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EF 5096 bytes
font_02_sfnt_off00009617.bin
26c2c7b760f61a7123796f95b0fa49b992e5efd1980035778e8a0a74780e4d25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9617 7212 bytes
font_03_sfnt_off0000a9a5.bin
076167f814cc1e32241352e97185a92dfcf2b4eed1308fe5fac37a305f108b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A5 12148 bytes

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