Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72e5646cfd7e18a…

MALICIOUS

PDF

63.4 KB Created: 2020-08-15 08:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c585df3ecb3acdb75daf3bb722b4efb2 SHA-1: adbe389e8b16d175df168c0807d8bd1b4223e157 SHA-256: f72e5646cfd7e18a1c620f3cb100593cd945231a0dbb6d65c7c1c0cd6d2b7151
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link farm and a redirector to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to external sites, potentially for further exploitation or phishing. The document body itself is heavily obfuscated and contains the primary malicious URL.

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=butterworth+high+pass+filter+pdf
    • http://tavew.gorgehcfa.org/uploads/1/3/0/8/130874592/loruxaku-zokufezupudoboj-niveluzejuv.pdf
    • http://fanana.niagarasuicidepreventioncoalition.com/uploads/1/3/1/6/131606027/d226b03.pdf
    • http://files.whosmysugarpie.com/uploads/1/3/1/3/131383657/1155111.pdf
    • http://files.farquharfinancial.com/uploads/1/3/1/4/131438389/61b8896.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/rupinder_gandhi_original_photos.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/pewulibigeko.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/rezafajakikubepikedupe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/71602556133.pdf
    • https://cdn.shopify.com/s/files/1/0437/0219/0235/files/bafg_anlage_1_formblatt_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/1454/3771/files/59845904992.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/suwixajosujitajexalifabi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/bacteriologia_libros_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4493/6599/files/92398575966.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/37402449556.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_off00009634.bin
d3434e171fe6dc0b6808c562208d38f128b569648d09b08b7b3f2e579c4b8e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9634 5444 bytes
font_01_sfnt_off0000a8c8.bin
5da6fd07421a68e63570f92a9ff41f46f67159b13a08bfb700d850ff454003af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C8 15816 bytes
font_02_sfnt_off0000daa8.bin
30b139a08a5f9654dcffe90ce7bd8c2db7ab7cafa9d95024b6c49312948cfdaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 16148 bytes

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