Malicious PDF — malware analysis report

Static analysis result for SHA-256 887bc7cacfd2ec03…

MALICIOUS

PDF

71.3 KB Created: 2020-08-30 13:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 163d1e69dcb66aac171422c636c31815 SHA-1: 853ba8bb63eaa0c2db302cd14c454d84187ec761 SHA-256: 887bc7cacfd2ec0360f1e25033ed43374d6673f0d3f3e92b67060d9bdef5f57f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=home+alone%2528+franchise%2529'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious link within the document.

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=home+alone%2528+franchise%2529
    • https://static.usrfiles.com/ugd/9cc572_7d16298af2e7448c806ff4aa50cbcc2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ad9077bb1ae479a94ef372cc60da741.pdf
    • https://static.usrfiles.com/ugd/b8c837_381aa3bd863a4c23a4a420bf189cbeb8.pdf
    • https://static.usrfiles.com/ugd/5438e3_cb648856b9c94a10933fc17d13fac95d.pdf
    • https://static.usrfiles.com/ugd/5bb01c_d9fadccdbfc3406ea8e101db2bdd7b46.pdf
    • https://static.usrfiles.com/ugd/451461_ddb0f92210754b5486e83d679bcefb3a.pdf
    • https://static.usrfiles.com/ugd/bf650e_ad48cc14cf944a2e94dc04c8d4f147e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4b78f0c91ff4000a4e5cf4d52f44875.pdf
    • https://static.usrfiles.com/ugd/865d50_26059c7b1bb04f34a66166c5b7b38535.pdf
    • https://static.usrfiles.com/ugd/eda9ba_78aa47a500444f618c47368193374d7f.pdf
    • https://static.usrfiles.com/ugd/51c472_a3e763d4f4d540a8a09e3bdcfdc2d05b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7615/files/saxibubotanex.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/prepagos_sabanalarga_atlantico_fotos.pdf
    • https://cdn.shopify.com/s/files/1/0438/4024/1829/files/espresso_english_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0463/3044/5981/files/toy_blast_game_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9977/files/lego_harry_potter_minifigures_2018_guide.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/
    • https://cdn.shopify.com/s/files/1/0438/4024/1829/files/espresso_english_phrase

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91d.bin
d9425e4c12f9e53d413edae1b9c17da046bd4fdc1c2d629778e19ebfef5d2c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD91D 5236 bytes
font_01_sfnt_off0000eac9.bin
a33230c045bd5b3626e7d3f197483b70fb126eabfc05eb0380d1460ee1c7bdc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC9 10960 bytes

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