Malicious PDF — malware analysis report

Static analysis result for SHA-256 5569aab342e0bb81…

MALICIOUS

PDF

52.9 KB Created: 2020-09-02 04:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da92be6ad7f9edda9969e1c683eb144f SHA-1: a489b56512123699a78d5e5952fc0bdd5eee89a6 SHA-256: 5569aab342e0bb81b5701109af4c8686b5a659f92f08964be6f1c7e8f98b5dc5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary intent is to redirect the user to a malicious site, likely for further exploitation or credential harvesting. The ML classifier also strongly indicated maliciousness.

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=bollywood+new+movies+2015+mp4
    • https://static.usrfiles.com/ugd/0ebc1f_6e1cb4f2af994ac8b3f9e6ea956fc6b0.pdf
    • https://static.usrfiles.com/ugd/7f929b_f75fd2fcbe6642699024ef884d7d8254.pdf
    • https://static.usrfiles.com/ugd/ace02d_a4ca22c7555f49e1a0d175ce42cc59b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9484169f27cb4bb9ba43388afdc33d1b.pdf
    • https://static.usrfiles.com/ugd/221f3a_0202d079337e4316889e6d740dc54efc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0f40f6d51cd4ed3a4cd5aecdc74f11a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9e377371a5b4457b6a196d957fd3a1a.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/63073321773.pdf
    • https://cdn.shopify.com/s/files/1/0438/9086/8379/files/55204293877.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/49579778610.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/42813430603.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/patient_cases_for_medical_students.pdf
    • https://cdn.shopify.com/s/files/1/0462/2211/4970/files/avg_free_antivirus_full_trial_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/mahealthconnector._org_online_application_renewal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/1651780976.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/tejuludilari.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/bihar_si_exam_syllabus.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_off00008f63.bin
2c09dfdaa48776bffb9d8db2cc23f75c553e406d6227666382e741793a768fae
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F63 5640 bytes
font_01_sfnt_off0000a2c0.bin
dca8d768c2c571b98ea1f1ace18d48ef78919b4ad34458c5c052165421792554
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C0 10528 bytes