Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1e3434475c4d29…

MALICIOUS

PDF

41.1 KB Created: 2020-09-01 10:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26c5673716efc8fdc502ca631deb765b SHA-1: 4a53d1fabba38db00816c03c2a7eb8e1a3c78e50 SHA-256: 1e1e3434475c4d291498c87cde5673ed94356e6e5cfefb43fa18c38a6a49d4a8
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'study bachelor of information technology in australia' and includes the malicious URL. This suggests a phishing or scam attempt where the user is lured to click the link under the guise of academic information, leading 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.ru/wix?keyword=study+bachelor+of+information+technology+in+australia
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/69312107215.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/33605642092.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/enzimas_antioxidantes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/xamewegidaxafotolasela.pdf
    • https://cdn.shopify.com/s/files/1/0437/5796/1365/files/asme_b31_8_free.pdf
    • https://static.usrfiles.com/ugd/191a6d_0a7d6825b6e044b5ae6c180979af8308.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_4f8fa2c59bf340f08e49dc14d3af1997.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/tafaradovevaluzunewogu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/sesepuvarezebibopololexob.pdf
    • https://cdn.shopify.com/s/files/1/0461/8276/0601/files/51059560757.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/marabusalatikufipuragupa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3173/9033/files/dirubovogurudemowuxuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/2690/5245/files/86111879728.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/komojuxurifefoxizuxuzun.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_off00005f71.bin
bcf7906fbbeb34a5bf5f0d5768fc4c913d414a1f11a44aad480afe40920f9554
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 5780 bytes
font_01_sfnt_off000072fc.bin
b005d0f12973849570bd0f3df77f25ab86adf2055b1272e14b788cb539dd0d8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 10580 bytes