Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a14862b05ca711a…

MALICIOUS

PDF

46.4 KB Created: 2020-08-30 00:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c85f61472e19ea0058cf0566c327a0db SHA-1: 0179f1f5c0f38f1fb12e6a1553e188fe49ac29e3 SHA-256: 7a14862b05ca711ac8a5f941b2bf367d29a913a1fdb2dbca22b1e79e1426af9a
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches one of the identified malicious links, suggesting a lure for users to click through to potentially harmful content. No scripts were extracted, but the sheer volume of links points to a distribution or phishing attempt.

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=revelation+online+occultist+stats+build
    • https://cdn.shopify.com/s/files/1/0457/9183/8364/files/83788781478.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62222626122.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/56684773256.pdf
    • https://static.usrfiles.com/ugd/277b62_57594098bf4040c0848906bad092a6e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c45879901e34e7a9171cf37e6f36f16.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_34b66e056e8b478491431b100d4de086.pdf
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/abnormal_psychology_butcher_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2643/files/xanaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/bipajilejivekili.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/report_card_comments_for_kindergarten_science.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1508/files/tanib.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/58357776830.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/jimojibiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/22811132756.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7696/files/inverse_properties_of_logarithms.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_off0000647b.bin
3a8d45fb834ebcfb2b852964ed3fc5e16780a65ecc759399b754e03a9cc1000d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647B 5044 bytes
font_01_sfnt_off000075b6.bin
7e448c0215bfebcb41193611e3ebb734dec4ef97e66d0a494b7dce229e4462e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 9820 bytes
font_02_sfnt_off00009798.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9798 16092 bytes

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