Malicious PDF — malware analysis report

Static analysis result for SHA-256 421285eb66a47a2c…

MALICIOUS

PDF

46.9 KB Created: 2020-09-02 01:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc2a59b3433f1b09642da33482b58257 SHA-1: d8204961564dfa28a778abe384da1f166a5e576c SHA-256: 421285eb66a47a2cf4bc26fe092e83acf4b066f72800a4b58d9dc7c3c9999d29
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to Shopify-hosted PDFs. The primary malicious IOC is the redirector URL, which likely serves as a lure to a malicious site.

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.cc/wix?keyword=bed+sheet+sets+at+walmart
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/15009206429.pdf
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/katuvixekidejusamasiloto.pdf
    • https://cdn.shopify.com/s/files/1/0435/6656/3487/files/betajubezazopumojeroxuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/bitmap_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/6559/6321/files/kigatibazigipujajomanafog.pdf
    • https://cdn.shopify.com/s/files/1/0437/1454/3771/files/21613052792.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/57464945564.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/81003162576.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/hcg_pct_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/35322665241.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/counter_strike_online_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/calculus_1_by_thomas_finney.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/computer_general_knowledge_questions_and_answers_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/7869/7631/files/e6_88_98_e7_a5_9e_vgtime.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/88125519938.pdf
    • https://static.usrfiles.com/ugd/f515ca_4bdb70e380de4e59a1f47ddb1216ab78.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_7503550ad4cf403dab02836a85199cc8.pdf
    • https://static.usrfiles.com/ugd/2f7815_163aae86d195485ba7c2d085fc9eef7e.pdf
    • https://static.usrfiles.com/ugd/696b8a_3d2d00ef42ca4c579085b562ce9cc433.pdf
    • https://static.usrfiles.com/ugd/b8c837_20e39a787be1497a9b1ff2e3c267bea5.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/
    • https://static.usrfiles.com/ugd/b8c837_20e39a787be1497a9b1ff2e3c267bea5

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078bb.bin
645a48303998bef0dd8271e1416bcd10fdf675276e312cf485fc681ce5356434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BB 5208 bytes
font_01_sfnt_off00008a56.bin
880a567c65b71868f61f792111949bd9e90d6ece01181f23ebdd2f1fbaf7d0ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A56 10600 bytes

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