Malicious PDF — malware analysis report

Static analysis result for SHA-256 783afdaf5c055f45…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 23:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2fbf6d1dd64809920d1d6a80fbf7441 SHA-1: 1ac8dd243b3adef5cabd1b9f969097eb3f8fd967 SHA-256: 783afdaf5c055f455eef7a5bc1d7462b5d61f973a637cf21a4a9ba9ead5e5e5f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the URL for the redirector. This suggests the primary purpose is to redirect the user to malicious content, likely for phishing or malware distribution.

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.com/pify?keyword=cetonas+en+orina+pdf
    • http://files.phillyfoundationrepair.com/uploads/1/3/0/7/130775398/niranujesuzi.pdf
    • http://novot.jacobsonviolinstudio.com/uploads/1/3/2/6/132695569/zudiku-nelulexujifel.pdf
    • http://files.chipplondon.com/uploads/1/3/1/4/131437604/supefi-kolut.pdf
    • http://files.winslowfarrsr.org/uploads/1/3/1/3/131380480/3ddad052f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4914/7816/files/manetajuzixupupuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/3428715716.pdf
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/vuvufiwotirudunoneb.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/8947041236.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/jikawetopepawibog.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/14735803009.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/frankenstein_study_guide_answer.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/xotovudekazarotun.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/contoh_soal_aritmatika_sosial.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/bomapel.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ddc.bin
ad6c6b6bec30424d455ef77634213b8aa8e7ac156240f009f463605a79bae866
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 4908 bytes
font_01_sfnt_off00007e95.bin
2624ab32ec68c4020d5a80c5e2a40a1bac2d0957d5fd97388bb12bcd2e8d907f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E95 11104 bytes