Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce65f02c3377d300…

MALICIOUS

PDF

46.2 KB Created: 2020-07-30 14:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5190b11232fea02575880263cd51ad7 SHA-1: 5655c23625a28cdef41136002c255a0c1b682909 SHA-256: ce65f02c3377d300cb62491996eba895691b2729df53741e103abac38a6d663c
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be largely obfuscated or corrupted, but the presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

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/pify?keyword=capitalismo+o+que+%25C3%25A9+pdf
    • http://files.lovehealthyme.com/uploads/1/3/1/0/131070894/bbfc027a3d.pdf
    • http://files.mountainridgecounseling.org/uploads/1/3/0/7/130775848/8e6607.pdf
    • http://files.luvafrenchbulldog.com/uploads/1/3/0/8/130814056/tefurim.pdf
    • http://files.akademosresearch.com/uploads/1/3/0/7/130739918/nuwesi.pdf
    • http://files.noho-mowo.com/uploads/1/3/1/8/131856278/701613.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/18697641059.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/josegegunasurawefetara.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/sufafafaxadafuloji.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/zuwamoginuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/xonixopunesuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/50241946868.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/vatomarudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74098669839.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/xurogupota.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/soselo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/94280670947.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/44710630909.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/texilekogikokurufuja.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/luzukatudizixovunurameke.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_off00007417.bin
b40768bbd307897377711988b318b98f239ac8546f8e88e52279ea4bdca00e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 5156 bytes
font_01_sfnt_off00008567.bin
bb1e543d44937ce3ac9931b36d724cfb1439ef506ac7432f95ed60f0185845c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8567 12052 bytes

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