Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec484ab41b25ebf8…

MALICIOUS

PDF

39.8 KB Created: 2020-08-08 00:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de230c43b4159ac3a88bceb31deb2b04 SHA-1: 187d9ddda15267c220ae5e88d8ac878e65cd3f0f SHA-256: ec484ab41b25ebf855f90b406a53cd2c449370742e2f6435c4d64dea9ae8945a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for altruism-themed content. The presence of a link farm suggests an attempt to distribute malicious content widely.

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/pify?keyword=contoh+altruisme+pdf
    • http://files.robertbolger.com/uploads/1/3/1/6/131607163/1829887.pdf
    • http://files.getfitwithfaryn.com/uploads/1/3/2/7/132740277/metowosikovotijo.pdf
    • http://koxubate.3ravenstattoo.com/uploads/1/3/0/7/130775413/vitifa-zewazu-ruliz.pdf
    • http://files.biocoreintegration.com/uploads/1/3/2/6/132681544/6a83e683983cc87.pdf
    • http://lofegin.ltfdelmarq.com/uploads/1/3/1/4/131406082/6ab3a408b.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/a_whole_new_world_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/43390100827.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/39158157159.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/english_grammar_book_for_class_4_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/81583660287.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/52833967130.pdf
    • https://cdn.shopify.com/s/files/1/0430/9473/7045/files/software_requirement_specification_for_railway_reservation_system.pdf
    • https://cdn.shopify.com/s/files/1/0450/5144/5400/files/what_are_values_and_beliefs.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4434/files/battle_royale_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/trane_touchscreen_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/xotalekakosudoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/fogupofiferixinupegafogap.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/wokimevezikew.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_off00006026.bin
e6828578d73a638b03ec9e3389153acd4248209c7b05e71d4d82633946260341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 5188 bytes
font_01_sfnt_off00007196.bin
1b4213f79c8756737373e3dd0468cac5a7ae8fa8164150f2f831748353b7752c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7196 9676 bytes

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