Malicious PDF — malware analysis report

Static analysis result for SHA-256 d579ee0219e8ab63…

MALICIOUS

PDF

38.0 KB Created: 2020-09-10 06:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1b5d38ce6b12845056e73e2840cb543 SHA-1: b55bb24b8510d733ee0d7f9a40cf32ab6e8ced15 SHA-256: d579ee0219e8ab635eaba698b7b6a2d65f0b44f899728db187ec986b0600139a
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users to click on it. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a deceptive link within the PDF.

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.me/wix?keyword=latest+hd+marathi+movies+free++avi
    • https://static.usrfiles.com/ugd/1a94e8_a95c4ca08a26409e8c9585509627b470.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_664abc8f64d14eb691b7b96c415b3005.pdf
    • https://static.usrfiles.com/ugd/e2c223_7c75bbe841484e47af09a96bdd85f937.pdf
    • https://static.usrfiles.com/ugd/9374a7_9a863ccf7c01465cbedf32a1c66141b8.pdf
    • https://cdn.shopify.com/s/files/1/0449/9190/5956/files/eduardo_galeano_trke.pdf
    • https://cdn.shopify.com/s/files/1/0441/2270/1976/files/86982043947.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9584/files/gakuburisufenopebesakazox.pdf
    • https://cdn.shopify.com/s/files/1/0464/7134/8374/files/74596150955.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/17668553548.pdf
    • https://cdn.shopify.com/s/files/1/0438/5023/6064/files/jetaxugotofolobotodet.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/z390_aorus_master_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/calculus_concepts_and_contexts_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/20926880910.pdf
    • https://static.usrfiles.com/ugd/96bf9d_6f431a805e1e4ed4ae558e91eaa06640.pdf
    • https://static.usrfiles.com/ugd/b7ab08_ebfb2487611248ef94196c95c6636e50.pdf
    • https://static.usrfiles.com/ugd/60933b_0f3415a8909e4f8b99cfc8a3fe596938.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_off000057c4.bin
4bc396192a58dc05117cc34c015c6b46bded185608a2c4e9dd911bc6457667a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C4 5116 bytes
font_01_sfnt_off0000690b.bin
333274cadc7da02ed04a73369f4c61e9318f421c13a4ebe0bbc407396af4e9b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x690B 10172 bytes