Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9ae8b50d89d613…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 01:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e55eafd11cf3c3f0a68da736be7d755e SHA-1: f000623ae760b911996bbb316237125a07454943 SHA-256: cf9ae8b50d89d6136f7b2ecf8729e35c974bd611d2f62bc998f88256962cf66f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, suggesting an attempt to manipulate search engine results or distribute malware through a large number of seemingly benign links. The ML classifier strongly supports the malicious nature of this PDF.

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=norma+astm+a105+pdf
    • http://garilen.ren-ito.com/uploads/1/3/0/7/130739654/niwufefarezot.pdf
    • http://files.sossanantonio.org/uploads/1/3/2/6/132695493/wolixitija_donipemamuj_lugusifa.pdf
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/8/132815154/58853863.pdf
    • http://files.eastafricanscholarsfund.org/uploads/1/3/0/7/130776718/vemofuva.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/bratstvo_crnog_bodea_17.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/66268437835.pdf
    • https://cdn.shopify.com/s/files/1/0436/1070/1981/files/62992209993.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/rasawukawojokiradesori.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/difference_between_administration_and_management_and_organisation.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/the_actor_s_nightmare_script.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/dna_replication_in_prokaryotes_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/aashto_standard_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/30598241635.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/tuxitotenijezubiwifesip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/zuwuvexugudivavuxasuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/82586440607.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_off00007196.bin
04ca138563f48eb1752a73690f384f5f138d766e5d73580810dac3cad012283c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7196 5444 bytes
font_01_sfnt_off0000840a.bin
a045eade49ad2ac2b4096bb5fdd540cb1b16ae7772f96675c6c8f4d0da00c9e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840A 10628 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.