Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e674281c4118333…

MALICIOUS

PDF

43.0 KB Created: 2020-09-10 03:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e631e5a9aa239ed53e66d90dc7564dc8 SHA-1: e4a3a66fd016f166b041206989f16d1e38733766 SHA-256: 6e674281c4118333c79ec9fd7c86df23b9a47fad1f1c917440918f8c4edc4fe1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as malicious redirectors or part of a link farm. The document body, though heavily obfuscated, contains text related to a 'register form template responsive' and includes several of these suspicious URLs, indicating a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=register+form+template+responsive
    • http://files.bigbrobigsis-shelbydarke.org/uploads/1/3/2/3/132302710/runaneno_jivosifizidexim_kakaxakugijo.pdf
    • http://gawef.hawkesburynaturaltherapies.com/uploads/1/3/1/4/131406686/a8e22fc4333.pdf
    • http://files.xonoil.com/uploads/1/3/0/7/130776877/gibalitel-gupas.pdf
    • http://xawiv.officialmrsmith.com/uploads/1/3/1/3/131381679/4183214.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4551/0568/files/48672600324.pdf
    • https://cdn.shopify.com/s/files/1/0439/5512/6430/files/abnormal_psychology_ann_m_kring.pdf
    • https://cdn.shopify.com/s/files/1/0436/2544/7587/files/2003_ford_expedition_fuse_box.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/99864009096.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/pizoloxo.pdf
    • https://static.usrfiles.com/ugd/dcc11b_ba80dbf06801438dae6eb873a8611356.pdf
    • https://static.usrfiles.com/ugd/0d002d_0bf0cff2734e4f7f9b21c67170c930bc.pdf
    • https://static.usrfiles.com/ugd/9e14ca_9e54320155db4d7b824d52e0c949a41f.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/plural_form_of_bronchitis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/woxenodobowani.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/zasejax.pdf
    • https://cdn.shopify.com/s/files/1/0445/8404/2655/files/smoothie_king_menu_nutrition.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_off000069cf.bin
4a29d85c40ca539c63f5dc54505fae4c55dee76fe108240fb2c6d79df78f59bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CF 5288 bytes
font_01_sfnt_off00007bc6.bin
1c83d0c25e61899758c0b42af6a301467654d80cedea6634fdacce8f3f3b9c48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC6 10216 bytes

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