Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bd357619916430…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 00:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1ee76f436b3f781e6c131a9a93f8bc1 SHA-1: 2f8a10a5cc967cab265ead7b24baea6a9a01820b SHA-256: 89bd35761991643068cb3b6a7a57ba1229ba1ffa08b4c44ad266eb69a1c07705
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates the document's primary purpose is to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is sufficient evidence for this assessment.

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=ya%25C5%259Fant%25C4%25B1m%25C4%25B1zdaki+enerji+d%25C3%25B6n%25C3%25BC%25C5%259F%25C3%25BCmlerine+%25C3%25B6rnekler
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/monosacaridos_definicion_y_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0437/4750/8376/files/80569845309.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/jikoxuvewasenaxakuti.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/letter_of_intent_for_internship.pdf
    • https://cdn.shopify.com/s/files/1/0459/9382/0327/files/wivozezoduxafunomojuvidus.pdf
    • https://static.usrfiles.com/ugd/a18aa6_aa3a1c1d902d4725b188cf375ee7812c.pdf
    • https://static.usrfiles.com/ugd/a298ce_454316ef0f674eb2aaffef0f80abd7a9.pdf
    • https://static.usrfiles.com/ugd/8de238_97470001d36b428fbe5c25b157713fd8.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/referencias_bibliograficas_apa_y_vancouver.pdf
    • https://cdn.shopify.com/s/files/1/0428/6477/1238/files/damerovewovux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/dagotaguv.pdf
    • https://static.usrfiles.com/ugd/06497e_5fba1afa1b524a9f850f92136ff89a03.pdf
    • https://static.usrfiles.com/ugd/0df15e_a07cc1bd1d534f17b492c8061654f520.pdf
    • https://static.usrfiles.com/ugd/ca32a8_4334a46e65e54667941503cd5f703496.pdf
    • https://static.usrfiles.com/ugd/b8c837_52637f0ed32840d0a19be67597a8bf2c.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_off0000626b.bin
d41ffd2880080256924af73f64773b3ef9040f9ea559eab540333a3bb955a0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 5484 bytes
font_01_sfnt_off00007482.bin
c7477d32937a68744c5c4c68b88e13ae77d31f5d0d9d60e07d74f4e2db349ae4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7482 16384 bytes