Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f1799da8a9a2d5…

MALICIOUS

PDF

40.4 KB Created: 2020-09-07 00:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4afacecd21be8d0eed80429c137a8a4 SHA-1: 248cbb7e959a53659ac4d0e792b3d91f30ae8a6a SHA-256: 62f1799da8a9a2d59e4659c51d4df75902f8266b06d15837fcd6f8af42dee1f7
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised with a keyword related to 'picsart apk pro'. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to potentially harmful content.

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.link/wix?keyword=picsart+apk+pro
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/xaduxonubonanomugagoverus.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/razevudajuna.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/29028626268.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/edital_verticalizado_prf_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/37244744550.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/a_field_guide_to_getting_lost.pdf
    • https://static.usrfiles.com/ugd/b8c837_eed5214769894018ade179f2bcb6e221.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ba49b58ce7449a587958b952fcb2dcc.pdf
    • https://static.usrfiles.com/ugd/52b593_572dba166fef4f7baeaaec1d87a03b20.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/curriculum_vitae_sample_for_fresh_graduate_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/6994/5509/files/wasurelipalifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/certificate_of_completion_template_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/lepaz.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_off00006242.bin
5b2259a422b546b99ad72a163aae7118d0d85697d735bd9e63bf96c4fa6361db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 4960 bytes
font_01_sfnt_off00007334.bin
d263c93eef8ea041e959067efc995c3d9392fcb9afa2f91ccf19bde6aa100f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7334 9920 bytes