Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc871957a3d0af6e…

MALICIOUS

PDF

50.8 KB Created: 2020-08-04 19:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8978fe8f111bda0827a60c94dab9503 SHA-1: 3ef04727b9804a2a3c7f4e44939c4ecc4aea6574 SHA-256: cc871957a3d0af6e2b3ed70cec48525ad65f2f66a3303f5df37e612cdafd8f21
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'english russian picture dictionary pdf' and the malicious URL, suggesting a lure for users seeking free content. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or malware distribution attempt.

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=english+russian+picture+dictionary+pdf
    • http://files.shoestring-lifestyle.com/uploads/1/3/0/7/130738993/rebobusefetumupu.pdf
    • http://files.thevacationchic.com/uploads/1/3/2/8/132815172/3553769.pdf
    • http://files.daashgroup.com/uploads/1/3/0/7/130776476/3041645.pdf
    • http://files.kimsfdldesigns.com/uploads/1/3/0/7/130738631/nevezijinowuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/organic_chemistry_klein.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/14828669340.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9870/files/sexovobupodixunoxuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/kaladesh_draft_archetypes.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/kedoloxisowiwibotol.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/perirof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/chacarron_mocaron_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/gunukak.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/29804539521.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/tudekisodimewan.pdf
    • https://cdn.shopify.com/s/files/1/0446/3240/8227/files/list_of_adjectives_to_describe_objects.pdf
    • https://cdn.shopify.com/s/files/1/0433/5435/7910/files/15929561105.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_off00007a70.bin
dbe5a2b079673b7e7c5fa9af50cb59b8862e4d7bd8dd2229e98da956626d3b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A70 5360 bytes
font_01_sfnt_off00008ca6.bin
aaf73203c828caf3feb7b53abd73144a8d93efbfb2101ae5630de12c836f3b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA6 10368 bytes
font_02_sfnt_off0000b018.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB018 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.