Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd085cb6bdb7dd35…

MALICIOUS

PDF

42.3 KB Created: 2020-08-12 15:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f6f1443391ce9026c125d60da9721e1 SHA-1: 78a4ebd13748487dd63bc4532f109baf1ce1653d SHA-256: fd085cb6bdb7dd35d852db54340cee58c2ccb7530a14efc91edbf35ca9a94297
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector (ttraff.ru). The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the link farm and redirector are strong indicators of malicious intent.

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=planimetria+y+altimetria+topografia+pdf
    • http://files.eaplab.eu/uploads/1/3/2/3/132303270/fdeb21662e8ce6d.pdf
    • http://files.hooperphotographic.com/uploads/1/3/2/8/132815807/68107fadf06030.pdf
    • http://xifise.getsumcharters.com/uploads/1/3/0/9/130969465/borawemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/nifuwanuzusop.pdf
    • https://cdn.shopify.com/s/files/1/0437/0769/5258/files/cch_chuyn_t_nh_sang.pdf
    • https://cdn.shopify.com/s/files/1/0429/1595/4855/files/grammar_and_punctuation_practice.pdf
    • https://cdn.shopify.com/s/files/1/0447/7173/7749/files/basketball_basic_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/54017414399.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/wefiguwonoxibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/89383720838.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/befewifavuzi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/anatomie_et_physiologie_de_l_oeil_humain.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/newotamurajipawegisavaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/2006_honda_rancher_350.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/39573186301.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/tisikumali.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/barrancos_mooney_descargar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb5.bin
6f8b06e603cd95ce4883724fc72d2bd505069e4a03aee955d4389082479007d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB5 5072 bytes
font_01_sfnt_off00006cdc.bin
3277392f654a7de53a5d0c9cfcdfb998d1feebdb306a776748257ef9b69e416f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDC 9812 bytes
font_02_sfnt_off00008e32.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E32 4324 bytes

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