Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de6e8a730ea8313…

MALICIOUS

PDF

43.9 KB Created: 2020-09-10 05:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3fb306be1c4129afcecf7a25f5797fb SHA-1: 3206aa2fb1d8da540bbffbf45582539f6de385c9 SHA-256: 1de6e8a730ea83139d361b0c7418f276e11cabefa6fb79ff8c3a1471bbe86440
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.link/wix?keyword=build+apk+react+native+0.+60', points to a known malicious redirector. The presence of a large PDF link farm suggests an attempt to manipulate SEO or distribute further malicious content, aligning with a phishing or redirection 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.link/wix?keyword=build+apk+react+native+0.+60
    • https://static.usrfiles.com/ugd/430cb2_3dcbd086c82d49b3b5b3664437bdaafc.pdf
    • https://static.usrfiles.com/ugd/fe83c3_570157ac8ea94fd6925bf536ad198f45.pdf
    • https://static.usrfiles.com/ugd/5e8de6_d62147b061a3440488f57b1b484e35ca.pdf
    • https://static.usrfiles.com/ugd/8ba634_52b0fd1268d644dcb49024ddf326b861.pdf
    • https://static.usrfiles.com/ugd/d5cf39_7879210c122a4cec8c856c8b1ebb179b.pdf
    • https://static.usrfiles.com/ugd/d3758e_55a1e518c4a844dbad349b8b6876c649.pdf
    • https://static.usrfiles.com/ugd/8d57bd_56507b70397c46dbbc5c455efa7ef258.pdf
    • https://static.usrfiles.com/ugd/3eed2b_c45304f103ca4fa48edb78d90a251e68.pdf
    • https://static.usrfiles.com/ugd/dcfb95_ef7e07a7a296403bba88bd9253fb51d6.pdf
    • https://static.usrfiles.com/ugd/ab0441_332b2ab349754a8a86bea3c40481bfa0.pdf
    • https://static.usrfiles.com/ugd/e2b09b_f0ba043f449f4e16a76afa9191dc141b.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_d786b490726c4413813808f282550574.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_off00005f5d.bin
68211ae1835f2fa3dc4a2882a647c5969f5612154de39b42c5d6fc78599c3e50
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 5160 bytes
font_01_sfnt_off000070f7.bin
912e228ba0db5b7987cc36abde3e6a455eb7e980757a88a45d6a1b243c620bce
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F7 10512 bytes
font_02_sfnt_off000094e0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x94E0 4324 bytes