Malicious PDF — malware analysis report

Static analysis result for SHA-256 1523791f30a1eb40…

MALICIOUS

PDF

49.2 KB Created: 2020-08-19 21:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc9203a9e1c0de51ffa363b4f825fd90 SHA-1: 261d415454cb6c7ea81db9a16cbeff7f06329e41 SHA-256: 1523791f30a1eb404f261d6992181eb58413b0697911feae946e69c6b7a8c10d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The ML classifier strongly indicated maliciousness, and the presence of a redirector suggests an attempt to lead the user to a malicious site for phishing or further compromise.

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=manualidades+con+botellas+de+refresco+faciles
    • http://files.fawnsartstudio.com/uploads/1/3/1/4/131437362/pijuwetasiten.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/dujopari.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/fonupakepokezopufebumiri.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/pidobivupavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/rofotebagadaditobefu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/zawovurani.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/pay_to_play_magic_training_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0441/2529/0648/files/adaraya_agamaki_official_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/22725835568.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0a.bin
a64fcb377ae8184b124a76fbf4433f189531a9276bee41a1e61d837ab248eb46
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0A 5160 bytes
font_01_sfnt_off00007b9f.bin
e82672496a636c8de9f283ae4357ed6aec4e51819c68447d01cdb3f9af2593ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9F 11184 bytes
font_02_sfnt_off0000a030.bin
e7c45facdd828572a2500b895614e3e2e1d14cf70a31229a256d14ba54da5073
pdf-font-stream PDF embedded font (sfnt) at offset 0xA030 16356 bytes