Malicious PDF — malware analysis report

Static analysis result for SHA-256 49676f26bafd5de5…

MALICIOUS

PDF

48.9 KB Created: 2020-08-09 11:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83e53e720bbafeeaa01f310da23eb79 SHA-1: d7796e5d5f8692f648e87d68bacda79f0e00b1cf SHA-256: 49676f26bafd5de579484c30ecb8c27cd81c04076ece55ddb019d69c330d7094
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though partially corrupted, includes the text 'Patient protection and affordable care act of 2020 pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further indicates an attempt to distribute content via numerous links. No scripts were extracted from this sample.

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.com/pify?keyword=patient+protection+and+affordable+care+act+of+2020+pdf
    • http://files.hillsdaleub.org/uploads/1/3/0/8/130814682/bezuj.pdf
    • http://files.hsmcwa.org/uploads/1/3/1/3/131380063/vurepa_fevezozimob.pdf
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdf
    • http://files.garlinstainedglass.com/uploads/1/3/2/8/132814219/4791304.pdf
    • https://cdn.shopify.com/s/files/1/0444/2020/2663/files/nufoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/sarawak_government_almanac_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1309/5067/files/40370833780.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/zenix.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/portuguese_verbs_conjugation.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/tinobotozulipexatosek.pdf
    • https://cdn.shopify.com/s/files/1/0438/2015/5042/files/tecnica_de_cateter_venoso_periferico.pdf
    • https://cdn.shopify.com/s/files/1/0431/5938/8320/files/81556162544.pdf
    • https://cdn.shopify.com/s/files/1/0432/1968/1437/files/riwesadakiketofakuvomaruw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/5636344093.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/venogivodabutijotuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1294/files/18590086330.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/fireworks_animations_gif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/vigipif.pdf
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/p90x_lean_schedule.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ef0.bin
937d38625354c6deade67cfe2e96367cd3ea72bcc396cace983f044e3099bf03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF0 5388 bytes
font_01_sfnt_off0000914f.bin
96c54044a84cb31268ca878ffca48584cd99d187d6816e93bd93af9e2c648ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x914F 10920 bytes

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