Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6d4826565b4378…

MALICIOUS

PDF

33.8 KB Created: 2020-08-22 03:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9df2f2b9f84d9282b1cbc6289d40400 SHA-1: d6917f4486f66e3ee8222ff6cffb4d422089c5b2 SHA-256: 1f6d4826565b4378bb105c28d1a6b2ad01f915d101c46cdcbcdd639eff56bbc4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm. The document body contains a URL that appears to be the initial lure, 'https://ttraff.com/pify?keyword=facebook+lite+2018+apk', which is likely used to redirect users to a malicious site. No scripts were extracted from this sample.

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=facebook+lite+2018+apk
    • http://mebiras.pow-miafamilies.org/uploads/1/3/0/7/130740069/4b00e7f82ebcf.pdf
    • http://pumusujot.donegalfoundation.org/uploads/1/3/2/7/132710712/9406341.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/57894519452.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/pojebikuziramuxitabatod.pdf
    • https://cdn.shopify.com/s/files/1/0463/4175/0945/files/5064154429.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/jasib.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/64709026393.pdf
    • https://cdn.shopify.com/s/files/1/0451/1626/0517/files/ww_carquest_com.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/21825778989.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/kuzoxefuxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/kulerilol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/raselogekilakitofubatol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047b1.bin
7e6499447d94a8fd833da2dbfe78e1372ca8cf136dbf2a8df7448d09d9043228
pdf-font-stream PDF embedded font (sfnt) at offset 0x47B1 5332 bytes
font_01_sfnt_off000059e3.bin
6c8009f519c2a466527a450cbc51dac8afd6ab7a853f711b47e51f099f12b9f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E3 9712 bytes