Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b5639976c287dc…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 08:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07da4dbcec8b837fa914c4d880938545 SHA-1: 971c273fb917325a517c03546d3286d3a663006a SHA-256: b9b5639976c287dc8a86dbcba61f2b2d279d7fc91084096dd1f6339dd7367604
152 Risk Score

Malware Insights

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

The PDF contains a link to 'ttraff.ru', identified as a known malicious redirector. The document body also contains text related to 'Call of Duty open beta', suggesting a lure to entice users to click the malicious link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources.

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/wix?keyword=call+of+duty+open+beta
    • https://static.usrfiles.com/ugd/f6a907_b4a6157bc2f64912af8fa0f2f9d8a824.pdf
    • https://static.usrfiles.com/ugd/857e61_ae5183928dcf47c7ac87f00cc54b51d2.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_18866e61dee548eabd507e750bb06c69.pdf
    • https://static.usrfiles.com/ugd/b8c837_734f0021fc9e4a6093b275344b3cafcb.pdf
    • https://static.usrfiles.com/ugd/aef5b7_ed07978649e342c7b3eb9afec86abc9d.pdf
    • https://static.usrfiles.com/ugd/01bc73_7ade2dec550c461da2d5a7033c53f905.pdf
    • https://static.usrfiles.com/ugd/e3c460_729b50779b084ecba432dbe6891a1be5.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/savumabexibapudu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/21359180368.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/51553234000.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/94813349342.pdf
    • https://cdn.shopify.com/s/files/1/0449/9731/2676/files/phenol_chloroform_rna_extraction_principle.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/88247836467.pdf
    • https://cdn.shopify.com/s/files/1/0437/8224/2466/files/android_8_one_handed_mode.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_off00004d03.bin
714a4207984790a55ac55a96d031664abf721a2737c51f0b8dd2efd72d1c793e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D03 4908 bytes
font_01_sfnt_off00005dc2.bin
b63345dc27c4f6aeb03b76b038e317d68dc4dc6cffb430888855427812dfdcbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC2 6312 bytes
font_02_sfnt_off00006e1f.bin
cb3b7f9d56a1aadf41a9550addf6ccc4d2c5093bb6b4ffd880ee12e84727c9a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1F 11168 bytes