Malicious PDF — malware analysis report

Static analysis result for SHA-256 da476462e4799427…

MALICIOUS

PDF

46.7 KB Created: 2020-09-06 13:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4c018ff4eced503bedc5500f58791b4 SHA-1: 2e4141b8ba04c264df21f48201f7e3fa50391a25 SHA-256: da476462e47994274c52dc4044749d7d1ef6b4a3583ec9d04b6c8760fc0c6b54
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bomberman 2 apk aptoide' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. 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.me/wix?keyword=bomberman+2+apk+aptoide
    • https://static.usrfiles.com/ugd/3801ff_8e9f035ca823499891c6f3d3f6c517eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fefe531d7f564c27b32e55273aa86ebf.pdf
    • https://static.usrfiles.com/ugd/83b1b3_5c2d4970916b4f34a316364704a67536.pdf
    • https://static.usrfiles.com/ugd/7198c1_5725eaa41e22437b89cb8583fa7f6954.pdf
    • https://static.usrfiles.com/ugd/97634b_0b18ac13ca1e41cda262409b17a6c3e0.pdf
    • https://static.usrfiles.com/ugd/4d935e_3f988ead56db4d8bb58aaf88982e863e.pdf
    • https://static.usrfiles.com/ugd/362633_1917f54074034434b228f6dec433211a.pdf
    • https://static.usrfiles.com/ugd/9f06f8_75b3ccbeac734ac3884f08f7826f14df.pdf
    • https://static.usrfiles.com/ugd/1849a1_3ba4bc0e2ea84027b436a10866e60b28.pdf
    • https://static.usrfiles.com/ugd/6cf392_add3aabc2d4349d3a9ea60c5deefea66.pdf
    • https://static.usrfiles.com/ugd/136d07_6ba77f01192e40e385341408806084de.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d96980ea4e847a6a7880b82de79ca64.pdf
    • https://static.usrfiles.com/ugd/54fa57_6496e34dea9f41ff8ae8f7e5b59eac45.pdf
    • https://cdn.shopify.com/s/files/1/0454/6533/8014/files/antecedentes_historicos_de_la_independencia_de_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/67161302996.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_off00005f8e.bin
d7ca86553a68571ebb0c2604e7b934a18b31d4020c4aca09e68b5ebeba79fd7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8E 5280 bytes
font_01_sfnt_off00007164.bin
e128e81b180762c255f75290666fecd0ad69db41a12745e7754a9e3b18fbf4e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7164 10164 bytes
font_02_sfnt_off0000945b.bin
bdd4cd8401f4c7e9727561a1037e79c15912705b4ef96978d6da76b80b105d4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x945B 17164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.