Malicious PDF — malware analysis report

Static analysis result for SHA-256 922db36981b2954b…

MALICIOUS

PDF

37.0 KB Created: 2020-08-17 04:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14b35d512f3fc92878ac30743f64a6fd SHA-1: 2603b136de41494113e745c8d8f6bceba89f3227 SHA-256: 922db36981b2954b16e71ab82866ec6c77da413bce2a4755fecb850f9062774c
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains multiple heuristics indicating malicious intent. Specifically, it features a link farm with numerous external PDF links, one of which points to a known malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=banjo+dj+song++mobilekida, which is likely used to redirect users to 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=banjo+dj+song++mobilekida
    • http://files.tilburgmun.com/uploads/1/3/1/0/131069879/derufupepukanit.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/97463770796.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/gopath_not_set_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/4701/0972/files/ansys_beam_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/kefedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/68861885522.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/5093264511.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/53034185163.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/javuribakowizilefegawod.pdf
    • https://cdn.shopify.com/s/files/1/0435/0921/9492/files/kelosixafofoduwagipav.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/agatha_christie_la_serie_infernale.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/27643013922.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/91267376692.pdf
    • https://cdn.shopify.com/s/files/1/0454/0645/3928/files/easter_alleluia.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045d0.bin
53019ebd7f759ecf001e2fd7d765a38cf95d96d8c1c5890187cf9f346c54efe9
pdf-font-stream PDF embedded font (sfnt) at offset 0x45D0 5376 bytes
font_01_sfnt_off00005815.bin
bca628ad7a9e0a6778fb5c69ac7c3c2099ea484a23a09e8996b5a8578604e376
pdf-font-stream PDF embedded font (sfnt) at offset 0x5815 9652 bytes
font_02_sfnt_off00007961.bin
cb0dd6483c86655cb51bb6a3a5d7507a71f38630796ffa1294b3eaa93a489086
pdf-font-stream PDF embedded font (sfnt) at offset 0x7961 3424 bytes