Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e99592a01c956f…

MALICIOUS

PDF

48.7 KB Created: 2020-08-30 01:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccb01595a504b66280a90c36fe4346a5 SHA-1: 73a140c79bd28d495c9d08ef83968f8f6ce6423c SHA-256: 53e99592a01c956f24dda44dbb7fa7058f2ec4b052e6d77f73f675bf1a085be4
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL. This suggests the document is designed to lure users into clicking the malicious link, likely leading to further compromise.

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.ru/wix?keyword=super+mario+64+merry+go+round
    • https://static.usrfiles.com/ugd/c836c3_a7bad155d16a45ccb28d16c5b4469438.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fd757cb0e90442f996a960c16712c9d.pdf
    • https://static.usrfiles.com/ugd/39cb9d_e1c4562f761342e99a489a11bda87b40.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/canon_eos_80d_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/20770182777.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/autoformation_en_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/67035016789.pdf
    • https://cdn.shopify.com/s/files/1/0448/0139/2801/files/discord_server_themes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/thunder_boys_like_girls_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/solar_atmospheric_water_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6854/files/umbilical_cord_blood_banking.pdf
    • https://cdn.shopify.com/s/files/1/0436/8079/2729/files/rokasipi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e8f.bin
817c141245c58a7d0c9c037c6570a4c5d19071994bd8fbd854faf381690cfd4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8F 8924 bytes
font_01_sfnt_off00007d28.bin
ad4a431889a75ba76a0e8a2386761a3b2484e79c0d8fc1416bbd803bcad844de
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D28 5516 bytes
font_02_sfnt_off00008fe2.bin
772b36331073f33608112ba25024801dd0317c3202a6ce86d9ccfcdbe59a5818
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE2 11428 bytes