Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c979645fe766dfc…

MALICIOUS

PDF

45.7 KB Created: 2020-08-22 00:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0027298b2c12d19285b0fdbc9870c14 SHA-1: 68e7378f8189c72850cc1e858248415c454ccb7f SHA-256: 2c979645fe766dfc2c5b09a7e4fd93a7948403af4477d856f4b4c4abe7d8a7bb
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to a datasheet and the malicious URL, suggesting a lure to trick users into clicking the links. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the use of known malicious infrastructure.

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=hp+folio+1040+g3+datasheet
    • http://toxazaf.jumpstartpreschoolavon.com/uploads/1/3/2/3/132302780/0c24b.pdf
    • http://terusozu.silverdappledesign.com/uploads/1/3/1/4/131453574/d70bc.pdf
    • http://files.kvclissold.com/uploads/1/3/0/7/130776350/0a03c9d534c9f1.pdf
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
    • http://bizuvab.katasangkhae.com/uploads/1/3/1/8/131856005/xipajitekijiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4519/0821/files/liputupumurodipuram.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6194/files/ckd_guideline_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0454/5226/3574/files/list_of_architects_in_pune_with_contact_details.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/87853329716.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/s_attribute_and_l_attributed_definitions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62092070186.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/baldur_s_gate_descent_into_avernus_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/international_financial_management_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/somenomorew.pdf
    • https://cdn.shopify.com/s/files/1/0433/6277/9295/files/78051363318.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/tilomabagarozifogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/8611768575.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/atf_box_flasher_usb_driver.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/array_of_pointers_in_c.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_off0000686c.bin
b441db5a6745edbc4c44381c0d065c2b7441fb42f02e8496e9220cdf9a7580b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686C 5616 bytes
font_01_sfnt_off00007b89.bin
5797f876744beed3a9b052dfda7db99ca2b606c6bc7ac76fcfc24c43993df8b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B89 14788 bytes

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