Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a502cc4d346c70a…

MALICIOUS

PDF

39.7 KB Created: 2020-09-02 16:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 216a186589ec1718d8544197fe9eec54 SHA-1: 6f1c50e46c8a53a245829e4354a40133a11e613a SHA-256: 7a502cc4d346c70af89603477fc1b2c5c68dd81a338f780128796583d02dd613
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text related to 'anime dubbed apps for android' and the malicious URL. The PDF also hosts a link farm of other PDFs, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=anime+dubbed+apps+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2638/0960/files/industrial_biotechnology_products_and_processes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7375/6572/files/que_es_la_aponeurosis.pdf
    • https://cdn.shopify.com/s/files/1/0429/4128/4518/files/borderlands_3_ps4_pre.pdf
    • https://cdn.shopify.com/s/files/1/0429/9728/5027/files/55187405228.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/53719586762.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/mewasegegux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/11193006100.pdf
    • https://static.usrfiles.com/ugd/115d6e_ded59570fcff45adb904d8c4f09e67d4.pdf
    • https://static.usrfiles.com/ugd/edb4a7_96e7968552134a1b9d26489a12223e2e.pdf
    • https://static.usrfiles.com/ugd/c3f88d_4fb53bb758bd4b08a3f0d963504d11b1.pdf
    • https://static.usrfiles.com/ugd/6df952_20f273663ab8413cb069b46ee24ae691.pdf
    • https://static.usrfiles.com/ugd/895bef_f83395425b304d4982883aafa66f7fc5.pdf
    • https://static.usrfiles.com/ugd/b88e3d_780742913ea34bf8948fdbbdaa44c751.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_off00005ddd.bin
0f033a958a77bfb0c4ea573656316e8ad318b4a662e5f7f70e5bf8043a65309d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDD 5284 bytes
font_01_sfnt_off00006fb8.bin
76663771f6a1b3942f8356c8aa2a9ee81eace535195b95db27dca8fc91d4ebcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB8 9984 bytes