Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe46d07e4a64906…

MALICIOUS

PDF

40.2 KB Created: 2020-08-18 23:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed6633e23e0afa71fe077fbc29710529 SHA-1: 33365b5ab8cb1cdf4313f905caab73dd2305dcb1 SHA-256: ebe46d07e4a6490604ce7eaf7fcd6e1bd31225d2924f54226d4b1d86fc2e3223
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly flagged this PDF as malicious. The document appears to be a link farm, with numerous embedded URLs pointing to Shopify and other domains, likely intended to obscure the malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=cygnus+knight+maplestory+m+guide, which likely leads to further malicious content.

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/pify?keyword=cygnus+knight+maplestory+m+guide
    • http://kusisuxal.theradiancerefinery.com/uploads/1/3/0/7/130739024/dojitidupo.pdf
    • http://files.learnaboutonline.org/uploads/1/3/0/7/130776205/jebafi.pdf
    • http://files.magicalchicago.com/uploads/1/3/1/8/131857115/tupolur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/xinobaselezugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/47725678086.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/74713823597.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1675/files/jotawokim.pdf
    • https://cdn.shopify.com/s/files/1/0452/5110/0829/files/guia_biomagnetismo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3483/5094/files/86627314923.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/tatimoseruvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6936/4629/files/logical_framework_sample.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/45335691562.pdf
    • https://cdn.shopify.com/s/files/1/0436/8154/6390/files/rilasu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4263/4917/files/95383719716.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/20201266017.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_off00005f1c.bin
b58e608abbd8c7616c2fefb422e085c66883ebb70b1b9af0888960c60bd95e96
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1C 5444 bytes
font_01_sfnt_off00007179.bin
d4c6cf73640568722ee8bc02e80dee8ef44d4de681eb09cef2b9fe4c0e39e2a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7179 10024 bytes