Malicious PDF — malware analysis report

Static analysis result for SHA-256 0087eba982bdca29…

MALICIOUS

PDF

63.8 KB Created: 2020-08-08 18:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b95edc8fadf4374b1f15b4b3bf0eeb67 SHA-1: b9a0ef55ff71d2e75f9a4f9c9009fd4492052211 SHA-256: 0087eba982bdca29eab897130f7776e18612be8de53229148319fbdd1d78fc13
174 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1566 Phishing T1566.002 Phishing: Spearphishing Attachment

The PDF contains a mass external link farm, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of a lure to enable macros or editing further supports a malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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=era+cenozoica+pdf+unam
    • http://files.stupedhillbilly.com/uploads/1/3/0/7/130776567/jojuzotanirixuv-relesotogugi-xogix-nugokap.pdf
    • http://rawuf.mga-gymnastics.com/uploads/1/3/1/4/131483281/rujagozamop_xovuvalul.pdf
    • http://files.launasorensen.com/uploads/1/3/0/7/130739718/kelikota_tubowu_rumesefamewu_fifofomoxusenu.pdf
    • http://files.communiteabooks.com/uploads/1/3/0/8/130814874/rinafe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/lamimegamusufuwedusowivak.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/73128377799.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/minecraft_call_of_duty_server.pdf
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/82954365583.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/69433353255.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/81072901867.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/monazata.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/tufonugojun.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/6593077689.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/ruziregana.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/76198087445.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/84250838334.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/pidowekupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8542/9917/files/repeat_youtube_videos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be1b.bin
24854fbf3b36d9144a82cf9c58972e7d1f817b0a7f369e0c94a8fd969e696fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1B 5100 bytes
font_01_sfnt_off0000cf6f.bin
dfd54a1e67cec160807c2b2931239793772e367523115c66ca4528947edd7f31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6F 10040 bytes

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