Malicious PDF — malware analysis report

Static analysis result for SHA-256 88008db9803196c8…

MALICIOUS

PDF

47.0 KB Created: 2020-08-30 05:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3924133aa15a6a6828980802450084f SHA-1: 2ab53cef15c602aab4547eeb3757d6ce4b338024 SHA-256: 88008db9803196c852491d25a45da39b08a2560ffdb356550176ee66a99a52b7
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, with numerous embedded links, many pointing to Shopify domains. The primary malicious URL identified is https://ttraff.com/wix?keyword=summer+units+monash, which is likely used to funnel victims to further malicious content. The document body contains obfuscated text and URLs, reinforcing the malicious intent.

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/wix?keyword=summer+units+monash
    • https://cdn.shopify.com/s/files/1/0429/4069/4684/files/69293837570.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/mortal_kombat_9_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/61246587126.pdf
    • https://cdn.shopify.com/s/files/1/0445/5025/8852/files/kolkata_metro_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4136/3870/files/treatment_guidelines_for_constipation_in_pediatrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/caltrans_traffic_safety_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/tovajupunudupe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/15765745764.pdf
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/54638544163.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3231aef4ee41f991438e683adcb6bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_3516c67845fd40e2adecda447aa46ce6.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97d1b49d85246f88f14ebaee3a5159f.pdf
    • https://static.usrfiles.com/ugd/83f04e_137aa88a73d74f3faf2ed0d280545966.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfc12aed518b47ab9eba0c7f889ab643.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5adc04bb8e148e19018b756e5eab315.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_off00007379.bin
b74960da6f12d20cf65842d876888a8e1befc2444dc9d1a408d96b262359abb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 4996 bytes
font_01_sfnt_off0000843a.bin
7ae7df04a284a492d3e0206f42d1346cb11b400f2f38efab7ed8618ff063263d
pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 13944 bytes