Malicious PDF — malware analysis report

Static analysis result for SHA-256 4430531e45e25d1c…

MALICIOUS

PDF

40.9 KB Created: 2020-09-10 02:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 56d70387918a938f9b5a966c3f7eb871 SHA-1: 259721e6316d4e64a993e33f67d02cd0df3a7440 SHA-256: 4430531e45e25d1cb164301d2d7944387cdb1f1fd3f2604d9c736baf825cceca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised as a search result for free books. This indicates a phishing or scam attempt to lure users to a malicious site. The presence of numerous other PDF links suggests a link farm designed to manipulate search engine results.

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.club/wix?keyword=anton+chekhov+books+free In PDF document text
    • http://files.slgtc.net/uploads/1/3/2/6/132681398/824058.pdfIn PDF document text
    • http://files.abcskatingacademy.com/uploads/1/3/2/6/132683357/eae7247e7bb.pdfIn PDF document text
    • http://files.trinityalpscmf.org/uploads/1/3/0/7/130776088/pogasafij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/cc1a03_60758868fa194af5a982b1d3bfe0db6a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6d45f6_bf5dc98f4a8349a6825f8536eb026366.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/76aeb6_e4e471ec3e464e438b445482dfab4fc5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a107db_aab39f871e10452e8e1177111d07192a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c52825cdeb7a4195b3b19cbfbc2a66c6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5059/0627/files/ielts_reading_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/warsaw_pact_ground_forces.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/957eb4_c6f25f8321264bf8adc0e76338e729d4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f103bb_5239f4b005ac4615aec922500682aef3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1f2646_dac41302371d492691bfeca5b43e2cbe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/79cb75_33c342e4a9d5469e878cfdf9ceb1b4f1.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 4980 bytes
SHA-256: 41dce4707c52b1784f562499509797ce4e8c30804849c4a7e9df85af92cd37c6
font_01_sfnt_off0000740a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740A 10192 bytes
SHA-256: 96fbf4654e296d8b607adb61955c4feede22971dfd811ea3178d2d509875c3fe

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