Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b896aac603a301…

MALICIOUS

PDF

34.2 KB Created: 2020-08-22 01:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d82c8ed75953fcbc97dc157998a0b918 SHA-1: 1517b9dea530e182b360cd74d02a227c6674355b SHA-256: c7b896aac603a301840818ece625a4ad021ed39457cc3569b6320a530f48cdd1
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to a 'rak ceramic tiles catalogue pdf' and includes the malicious redirector URL, suggesting a lure to trick users into clicking. The ML classifier also strongly indicated maliciousness.

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=rak+ceramic+tiles+catalogue+pdf
    • http://files.tre-pta.com/uploads/1/3/0/7/130775108/6692476.pdf
    • http://files.motoxotica.com/uploads/1/3/0/9/130970004/felifafokuker_paverisomajonox_bajorasuzip_tubori.pdf
    • http://files.markhegg.com/uploads/1/3/1/3/131383998/tumov_fikejuvute_rolexakubel.pdf
    • http://files.ashleydotson.com/uploads/1/3/0/7/130738499/9776555.pdf
    • http://files.theuilanifund.org/uploads/1/3/0/8/130814050/dorugapobod.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/vopafeteligu.pdf
    • https://cdn.shopify.com/s/files/1/0446/0973/2771/files/ceh_certified_ethical_hacker_practice_exams_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/40477188816.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/gusugoseg.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/70109110667.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/bosch_serie_4_varioperfect_manual_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/reading_comprehension_worksheets_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/26720033002.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/cracking_the_money_code_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/62882806358.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5095/files/vuvalapama.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/redfish_fishing_report_venice_la.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_off0000485a.bin
02187183015e2e317ff12f63183e881c2abda3de64bca6007f0c9a3483ff9532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x485A 5544 bytes
font_01_sfnt_off00005b27.bin
b63cb25876c2a144cc23ebaa2417189e7f1fc9f942c5be0285644a91d631d355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B27 9548 bytes

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