Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84c61762261bef1…

MALICIOUS

PDF

47.9 KB Created: 2020-08-11 16:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d4254d68ace3d363e5628d1f40b690f SHA-1: b13d525e37cd09bda21d4398ff8301de3a4282eb SHA-256: f84c61762261bef12be951a82a89f9ee78ab35a05cc91a5bb43b321d808d6f69
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=sample+of+a+lesson+plan+pdf. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the same suspicious URL, suggesting the primary purpose is to lure users to malicious sites.

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=sample+of+a+lesson+plan+pdf
    • http://files.ipsmusicfestival.com/uploads/1/3/0/8/130873876/torerofinezer_jusizamubi_ronagejofif_tapetebaf.pdf
    • http://files.alethearoygadbois.com/uploads/1/3/1/3/131384635/5b2cf6.pdf
    • http://diwazetok.merjomarine.com/uploads/1/3/2/6/132696212/9784958.pdf
    • http://tagoduf.scotteberle.net/uploads/1/3/0/7/130775432/dec9a16.pdf
    • http://files.sustainablelibertynow.org/uploads/1/3/1/1/131163561/6293200.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/6332286398.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/etiologia_del_cancer_gastrico.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/76625382868.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/catechism_of_the_catholic_church_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/cbse_admit_card_2020_class_10_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/mulimibe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/2396236169.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53940391871.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/dizamudipani.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/zazetamezuvuresuruzupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/94150984820.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/jadorowoviwopip.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_off00007cea.bin
360064252ee358f6db57f732aa0e816a5016ff3cf2fa170f04927e5c354a6f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEA 5192 bytes
font_01_sfnt_off00008e83.bin
3fd80ac2ee4989b77b28f64a221ac78144bad634b640661670c34a3b8a550963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 10632 bytes

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