Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9953358077eee6b…

MALICIOUS

PDF

41.1 KB Created: 2020-10-16 18:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 166adcb72a1c25b21322b6cd01de13a5 SHA-1: c188fa44a647613efc7300b9fa12726f5cfd42d3 SHA-256: e9953358077eee6bd9646e1a225be8ccdea1c271418532eae97aac91e6d6e53e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/123?keyword=types+of+retinoscopy+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the same malicious URL, reinforcing the attack pattern.

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.club/123?keyword=types+of+retinoscopy+pdf
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8757b0afe75.pdf
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8881c117091.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f871212097db.pdf
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f89a7a7bcdaf.pdf
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f8764a4f3eaf.pdf
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f88f4f5aae96.pdf
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f8900b7d6b59.pdf
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f87fd05c1032.pdf
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8734e2e0a2d.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/9232432.pdf
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/zapawok.pdf
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/fepuxomofugamem.pdf
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/xobagurozamuvaf_midevusi.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdf
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f872f6a8edee.pdf
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f88bcc9c3c17.pdf
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/fepuxom
    • https://cdn.shopify.com/s/files/1/0438/1288/0541/files/sowesidage.pdf
    • https://cdn.shopify.com/s/files/1/0499/5540/5992/files/public_record_spy.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/1843899532.pdf
    • https://cdn.shopify.com/s/files/1/0498/7253/5707/files/jusenipamawal.pdf
    • https://cdn.shopify.com/s/files/1/0493/4811/6639/files/6th_order_bandpass_for_2_12s.pdf
    • https://cdn.shopify.com/s/files/1/0481/4884/0599/files/lord_i_need_you_chords_in_e.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/journeys_practice_book_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/4928/6817/files/numirusobixo.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_off00006447.bin
28b2d41aa9101e217aeffe8b3b37140e35ff3862598eed1f139fef9525135676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 4956 bytes
font_01_sfnt_off00007540.bin
c9ee7dbaabf01c95c62e934f61ab3726c7728b653b8c4c0979a1334151a20f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7540 9868 bytes

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