Malicious PDF — malware analysis report

Static analysis result for SHA-256 753d8f9ec52b564e…

MALICIOUS

PDF

44.4 KB Created: 2020-09-02 07:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8bb0a0e7751f44dbd1a08f6c1a9d451 SHA-1: b0b3ec8657a442d4f6667b3346997c065e467e1e SHA-256: 753d8f9ec52b564e0ceb054d8e72ccdca131911898e4989eea8d15d25c9b5c32
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, identified as a PDF link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/wix?keyword=success+stories+template', is a strong indicator of malicious intent. While no scripts were explicitly extracted, the structure and heuristics suggest an attempt to lure users to malicious content, potentially through a phishing pretext.

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.cc/wix?keyword=success+stories+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/koguriketuvejebor.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6815/files/android_developer_cv.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/diploma_template_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/66784543858.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/76237340512.pdf
    • https://static.usrfiles.com/ugd/ade4e6_80ca26ff7fec4365a4aa79713ba39bf2.pdf
    • https://static.usrfiles.com/ugd/8ab72e_5659525e68564d0d8a0f54a079f699da.pdf
    • https://static.usrfiles.com/ugd/599026_699eb0afc58e4f6fbfb1838f5e116b95.pdf
    • https://static.usrfiles.com/ugd/39cb9d_c01c5d1e14b04e52aa45dbb3c62c4a5f.pdf
    • https://static.usrfiles.com/ugd/cd81e9_d96b7c7ba6454a8cbad3c3fdbbebceab.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/anita_desai_games_at_twilight.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ketotojugidumirazi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/24663892756.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642a.bin
53775fcf610ae9efee829ab07e09a71cff6559bda6d666b2c3eed491284f167c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 4956 bytes
font_01_sfnt_off000074f7.bin
20eb3e98abcc6c5874112b978bc142ee13087e6dc3dfe7e0fa5a5969b9bd20f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F7 9964 bytes
font_02_sfnt_off00009715.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9715 4324 bytes

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