Malicious PDF — malware analysis report

Static analysis result for SHA-256 557a9aa6aad81402…

MALICIOUS

PDF

45.7 KB Created: 2020-08-21 16:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29634058b5719b28179d3ffb392ff6df SHA-1: e513e91d64d4ea6377080eac11cb8e92016a7127 SHA-256: 557a9aa6aad81402f558f7542c05ebd544e041cfd252b369c37671c808645b96
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=bike+racing+games++for+pc'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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=bike+racing+games++for+pc
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdf
    • http://files.ethanallenrattery.com/uploads/1/3/0/8/130874238/7771840.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5789/files/safosino.pdf
    • https://cdn.shopify.com/s/files/1/0428/8453/0343/files/xubitovutoki.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/putanuranojunipuxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4497/6278/files/21853532765.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3493/files/wifuworofaxajotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/45210218445.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/fetch_post_request.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/magamikiromuzas.pdf
    • https://cdn.shopify.com/s/files/1/0447/9831/2609/files/microbiology_culture_media.pdf
    • https://cdn.shopify.com/s/files/1/0436/3950/5056/files/ignou_date_sheet_2019_ba_programme.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/84473253312.pdf
    • https://cdn.shopify.com/s/files/1/0440/2357/8774/files/amines_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0437/7519/7333/files/aggiornamento_android_lg.pdf
    • https://cdn.shopify.com/s/files/1/0436/0211/6772/files/universo_autoconsciente_amit_goswami.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_off00006629.bin
e53042e420ea195c9bd35955635e3b43a418f83495581b514f894bc124cbdcf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6629 5124 bytes
font_01_sfnt_off00007770.bin
a60327aab480a0c8944ada79d995bb36868878621e6fab70c4480621ba984fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 10652 bytes
font_02_sfnt_off00009bce.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCE 4324 bytes

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