Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11670c884b990b7…

MALICIOUS

PDF

51.3 KB Created: 2020-08-18 15:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c600b7cc77d877b9929f5a975f400e5a SHA-1: d062fee42378fc5947b7d56f4ee084bfc418e14e SHA-256: d11670c884b990b7ac6a9f22e210d507f0d3d6936a567afdf2d2a4613b82cb00
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign content, but one critical link directs to a known malicious redirector. The document body, though obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=burning+spear+mp4+songs', which is flagged as malicious. This suggests a lure to a malicious site, likely for further exploitation or credential harvesting.

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=burning+spear+mp4+songs
    • http://files.majestichouseofprayer.org/uploads/1/3/1/3/131380029/rupakopezosoti.pdf
    • http://files.flyingirishmandarts.com/uploads/1/3/0/8/130814676/56afb9.pdf
    • http://files.grewbuilding.com/uploads/1/3/1/8/131856827/4953497.pdf
    • http://novopijar.elizajoycesmith.com/uploads/1/3/2/8/132814930/denupi_nogatadebu_xagapojipera_ripaselebezexa.pdf
    • http://wizudip.silencednomoreasoldierscourage.com/uploads/1/3/1/6/131607505/a2ed756b44.pdf
    • https://cdn.shopify.com/s/files/1/0428/7794/3967/files/balloon_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/34841914942.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/nmr_of_proteins_and_nucleic_acids.pdf
    • https://cdn.shopify.com/s/files/1/0450/4734/9406/files/skepticism_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/jipofakozewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/18565278895.pdf
    • https://cdn.shopify.com/s/files/1/0448/0391/5933/files/bowuxamakiwazabobanexal.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/malaysia_horse_racing_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/int_to_binary_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/falimisexifemot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c9b.bin
8c9490a547c48d69bdf40d8eae18b5e7c07c06cee6f544d92a1af525dae037c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 5044 bytes
font_01_sfnt_off00008da7.bin
9d34b04ccbeb3bf0ab8a747724fbbad7f53df1fb326416158747cf7b7b2a27f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA7 10704 bytes
font_02_sfnt_off0000b23e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB23E 4324 bytes

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